I really need some relationship advice?

Well, my advice to you would be to just sit down and have a talk with her over these things instead of fighting over it and hurting each other over it. I know from personal experience that these things do happen inside of relationships. I've been with my boyfriend for over 4 years. I know how these relationships things work. I have been through the whole 9 yards and trust me, it isn'tt easy. Just sit down with her and have a nice talk with her. Try not to yell or scream because that only makes matters worse. I hope you and her get through this for the sake of love and for both of your hearts. I hope you appreciate me helping you with the best advice I can give. Good Luck!!