Talking about relationships

Boyfriend and girlfriend
Do you have a boyfriend?
Do you have a girlfriend?
Are you single?
I'm married
I'm dating someone.
I'm not single. I'm married.
When did you meet?
When did you meet each other?
When did you guys meet each other?
We've been dating since…
How long have you been dating?
We've been dating since February.
We've been dating for two years.
How did you meet?
We met through school.
We met through mutual friends.