i was wondering if anyone can help me out. so for the background information, during a point in my relationship my boyfriend left me for about a month, but we got back together, however during this month he told me about this girl whom was trying to hit on and get with him. nothing happened between them, he wanted me back and now we are back together. he seemed/ still seems to want to prove his innocence, he tells me nothing happened, he told her to leave him alone he wasn't into sluts and it was never going to happen. he has shown me/ given me all his social meida passwords, lets me see his phone ( not that i ask). and it all points to him telling the truth that nothing happened. but for some reason i don't beleieve him. it causes me to have uncontrollable rage to even think this slut even talked to him and im extremely jealous anyways, a fact hes known our whole relationship and him being in a band doesn't help. also the fact that hes in a band and he knew this girl through friends growing up makes it harder it deal with...she shows up to to shows when he plays and other things becasue of the mutal friends. everytime i see her i want to beat the H**l out of her and make sure she never comes around again, even though shes never really done anything personally to me. my boyfriend ignores her and avoid her at all costs out in public, but she'll still try to wave or say hi to him...whihc i don't understand why you would show up or try to talk to someone after they call you out on being a slut? can she not take a hint?

like i said before anytime i think about it ( which has been progressivly more and more) or see this person, i get into a horrible rage and want to react violently, though i never do. is there anything i can do to stop feeling this way? i feel like a bad person at times but then other times i feel justified in feeling like this not sure which is right