I totally understand you. I think it's normal to feel as you feel. But you also need to understand that it's your anxiety bringing all these thoughts of jealousy. It seems that your gf is a victim of these other guys trying to seduce her into cheating on you. But it doesn't seem like she is trying to cheat on you. I'd say try giving her the benefit of the doubt. I'm sorry that medication and therapy don't seem to be helpful in this situation. All you can do is try to manage your thoughts. Maybe also try communicating with your gf what you've been going thru without being confrontational or accusing her of cheating. Just tell her how you feel.