Meaning of ボーイフレンド in Japanese

I ran across an ex-boyfriend of mine in town the other day.

The women's college had a very small car park, and as several of the teachers and students, and many of the student's boyfriends, had cars, it was often difficult to find a place to park.

Mary always assists her boyfriend in doing his assignments.

I talked my boyfriend into buying me a ring.

What did you buy for your boyfriend?

She got into hot water when her boyfriend called her at work.

The father wouldn't accept his daughter's boyfriend.

He made no effort to accept his daughter's boyfriend.

Jane seems to have a new boyfriend.

Your boyfriend got tired of waiting for you and left just now.