Venting - opinions encouraged

I moved far away from everyone I know 2 years ago. I made a friend who I’ve been hanging out with for 1 year. I started dating this guy I’ve been with for 7 months. Anyway I messed up.

My girl friend and I were out at the club drinking and having fun dancing and we kissed one time.

As innocent as a kiss can be because we both like men. We would never have sex with each other because we both know we like men. I mean as long as we’ve been friends and hang out sex/relationship has never been a discussion.. We tell each other about our love life all the time we are strictly friends nothing romantic.

My boyfriend is really pissed about it though and doesn’t want me hanging out with her anymore.

We’ go to school together , she does my lashes and we even started working together recently .

This is the first time I’ve had a genuine friend in 2 years.

I’m sad because I know I messed it up but at the time I didn’t think it was that serious because it was a girl. But now he thinks I’m a lesbian and a cheater 😕