I think if acting is something you want to pursue, then I see no problem with this. You're both actors so keep things professional. That's why they call it acting, it's not for real.

She is overeacting I think. This is your thing to act, so go and act.

This happens all the time in movies. Look at the actress Ellen, she is a lesbian but has been on TV kissing guys before. There are plenty of actors/actresses who do this.