My mind is racing and i don't know what to do!?

She is not the right one for you, mister. I'm sorry but if she says she wants to have fun and meet other people, then it mean she dont know if she wants to spend the rest of her life with you. You are her option, not her priority. If you love someone, you pick them first. You picked her first, why can she? I'm sorry but she's being selfish. If she is going to talk to other men, then she is insecure and need them to make her feel wanted. Go find another woman who will pick you first, be faithful, and understand you.