How do I handle my girlfriend's past relationship or baggage?

My girlfriend is very paranoid about me and our relationship because she was cheated on in her past relationship. Even on an evening when I just try to hang out with my buds, she freaks out and talks about cheating on her or sth. How can I deal with this problem of hers? I don't want to break up just like that

How do I handle my girlfriends past relationship or baggage?
How do I handle my girlfriend's past relationship or baggage?
Post Opinion