Usage patterns
恋人ができるto get a boyfriend/girlfriend
I got a new girlfriend/boyfriend last month.
恋人を作るto find/make oneself a boyfriend or girlfriend
He found himself a girlfriend at university.
恋人と別れるto break up with one's boyfriend/girlfriend
She broke up with her boyfriend last week.
恋人と付き合うto be in a relationship with one's lover
The two of them have been dating as boyfriend and girlfriend for three years.