How can I tell my girlfriend it's okay to cut loose without sounding weird
Basically every time we're at a club or something she seems very uptight like she doesn't want to make me jealous by dancing around other guys or something. How can I say "yo I don't care if things get a little wild I'll be fine you can dance with other guys and cut loose and flirt if you want to, even if things get wild I'm fine as long as you don't actually cheat on me" without coming off as very weird? I know it's coming from a caring place but idc if she grinds on some guys or if things get a little wild. I know she wouldn't actually cheat.
Like I don't wanna flirt with or feel up other girls or anything, but if she wants to flirt and play a little it's fine with me. She needs to have fun and cut loose and not be so worried about me
Unless this is a turn on to you (which it sounds like), I wouldn't mention it. It's great that you trust her and have mellow boundaries, but to many people stuff you mention, like grinding, would in fact constitute cheating. She might interpret your lack of jealousy as lack of fear to lose her, lack of protectiveness or whatever else.
I think unless you really want her to do this you should just stick to strongly telling her you don't care and she can dance with whoever she wants if she asks you if something like that is okay.
If it IS a turn on, stress that. Tell her it is exciting to see her dazzle those random guys knowing you will get to take her home.