I need womans advice about me and my gf please!?

Is it ok for my gf to grind with her guy friends at a dance in front of me?? I mean I told her i didn't like that a couple weeks ago but today we alkyd and communication is a number one thing which was good we talked she said I get too over protective and she sais that's not good now we both don't wanna end things that's why we always communicate and I just wanna get things right is it ok for her to grind? How can I relax my jealousy with her guy friends wen she talks to them!? As u can c I have a problem and the problem is me!! How can I fix this honestly I'm sorry guys but I'm turfing to the woman girls and females for advice I need a wise woman to tell me what's right I don't wanna end anything so what's right and what's wrong!?