I've been down there. It's an obstacle I know.. I used to get jealous when she hung out with her guy friends, but to me jealousy is a feeling to let them know you care. It's natural. However, the way i've done overcome trust issues and jealousy was spend time with her friend(s). Try to not think about it, if you have any hobbies at all do them until you're so focused in that you forget about it or until it fades away. You know deep inside he wouldn't do anything, it's a natural feeling. Don't get too worked up about it. :)