boy friend (boyfriend)

Use "boyfriend" (one word) for a male romantic partner. Use "boy friend" (two words) only when you literally mean a friend who is a boy.

Below: clear rules, many real-world fixes (work, school, casual), six wrong/right pairs you can copy, rewrite templates, and a simple memory trick to stop the error.

Quick answer: Which is correct?

Write boyfriend as one word to name a romantic partner. Write boy friend (two words) only to describe a friend who happens to be a boy.

Boyfriend = romantic partner (closed compound).
Boy friend = a friend who is a boy (adjective + noun).
If you can swap in "partner" or "romantic partner" without changing meaning, prefer the one-word form or the neutral alternative in formal writing.

Core explanation: grammar behind the forms

Compound nouns like "boyfriend" join words to create a single idea: a romantic relationship. When the first word simply describes gender-"a friend who is a boy"-the two-word form keeps the adjective+noun structure intact.

Closed compound: "boyfriend" = single lexical item with a distinct meaning.
Adjective + noun: "boy friend" = a friend described as male (rare; usually "male friend" is clearer).

Hyphenation and spacing: where hyphens appear

Hyphens can appear with prefixes or in modifiers: for example, "ex-boyfriend" is normally hyphenated. Spacing is used when the first word remains an adjective describing a noun, but that use is less common with "boy."

Standard: boyfriend (one word).
With prefix: ex-boyfriend (hyphenated).
Adjective use: "a boy friend" is grammatically okay but often clearer as "a male friend."

Why writers split the word

People split compounds when speech reveals two parts but writing rules are unclear. Typing fast, relying on sound, or overthinking form can produce "boy friend" by mistake.

Sound-based guessing: you hear "boy friend" and write it as heard.
Spacing confusion: unsure whether the compound is closed, hyphenated, or spaced.
Overcorrection: trying to be literal about gender when context calls for "boyfriend."

How it looks in real usage

Context shows whether the romantic meaning fits. In workplace or formal contexts, a neutral term often works better.

Work: If a relationship matters for HR or scheduling, "partner" or "romantic partner" is safer than "boyfriend."
School: Student event invites usually read better with "boyfriend" if you mean a partner, or "male friend" if you mean a platonic friend.
Casual: In chat or text, "boyfriend" is common and expected for romantic meaning; "boy friend" will sound unusual.

Wrong vs right examples you can copy

Six clear pairs to train your eye. Each "Wrong" uses the spaced form; each "Right" gives the standard wording or a clearer alternative.

Wrong: Sara introduced her boy friend to her parents.
Right: Sara introduced her boyfriend to her parents.
Wrong: John and his boy friend celebrated their anniversary.
Right: John and his boyfriend celebrated their anniversary.
Wrong: She called him her boy friend at the party.
Right: She called him her boyfriend at the party.
Wrong: He's a boy friend from college (meaning platonic).
Right: He's a male friend from college.
Wrong: I need to bring my boy friend to the event.
Right: I need to bring my boyfriend to the event.
Wrong: Do you have a boy friend who can help move the couch?
Right: Do you have a male friend who can help move the couch?

Context examples: work, school, casual

Work
- Wrong: I need to take time off to take my boy friend to the doctor.
  Right: I need time off to take my boyfriend to the doctor.
- Wrong: Mention your boy friend on the form.
  Right: Mention your partner on the form (formal) or mention your boyfriend (informal).
- Wrong: Can my boy friend join the team lunch?
  Right: Can my boyfriend join the team lunch?
School
- Wrong: The student brought her boy friend to the campus tour.
  Right: The student brought her boyfriend to the campus tour.
- Wrong: He lists his boy friend in the project group.
  Right: He lists his male friend in the project group (if non-romantic).
- Wrong: Is your boy friend coming to graduation?
  Right: Is your boyfriend coming to graduation?
Casual
- Wrong: My boy friend cooks really well.
  Right: My boyfriend cooks really well.
- Wrong: Want to meet my boy friend later?
  Right: Want to meet my boyfriend later?
- Wrong: That boy friend of mine plays guitar.
  Right: That friend of mine who is a boy plays guitar (or: my male friend plays guitar).

How to fix your own sentence: step-by-step

Fixing the phrase requires checking meaning and tone, not just swapping words.

Step 1: Identify whether you mean "romantic partner" or "a friend who is male."
Step 2: Replace with the standard form: "boyfriend" or "male friend/partner."
Step 3: Reread for tone - in formal writing prefer "partner" or "former boyfriend."

Rewrite example: Original: I hope my boy friend approves of the decision.
Rewrite: I hope my boyfriend approves of the decision.
Rewrite example: Original: Is that boy friend joining class today?
Rewrite: Is that male friend joining class today?
Rewrite example: Original: She met her boy friend through work.
Rewrite: She met her boyfriend at work.

A simple memory trick

Picture the romantic meaning as a single unit. If the two words describe one role or relationship, write them together. If you truly mean "a friend who is male," prefer "male friend."

Visual trick: imagine the couple together as one label - that nudges you to "boyfriend."
Search your drafts for "boy friend" and replace in bulk with the correct choice.

Similar mistakes to watch for

Once you make one spacing error, related problems often pop up nearby. Scan for similar patterns and fix them together.

other split compounds (e.g., "every day" vs. "everyday")
hyphen confusion (e.g., "ex-boyfriend")
word-class confusion (adjective+noun vs. compound noun)

FAQ

Is 'boyfriend' one word or two?

One word when you mean a romantic partner. Use two words only if you intentionally mean a friend who is a boy - though "male friend" is usually clearer.

Should I hyphenate ex-boyfriend?

Yes. "Ex-boyfriend" is standard. "Former boyfriend" is a clear, hyphen-free alternative.

When is 'boy friend' ever correct?

Only when you literally mean "a friend who is a boy" and you prefer that phrasing. Even then, "male friend" reads more naturally.

Will grammar checkers fix this for me?

Most grammar tools flag "boy friend" and suggest "boyfriend" or another rewrite. Always confirm the change fits your intended meaning before accepting.

What if I want a neutral or formal tone?

Use "partner" or "romantic partner" in formal contexts. For neutral past relationships, use "former boyfriend."

Need a quick check?

Swap in "partner" - if the sentence keeps the same meaning, use "boyfriend" or "partner" in the final text. Run a search for "boy friend" across your document and replace instances with the correct option while reviewing context.