I can't stop looking through my boyfriends things

I am 21 years old and I have only been dating my boyfriend for about 4 months, but we started talking to eachother casually for the two months or so beforehand. It started as a casual thing, not supposed to be serious, but it ended up being much more serious than expected. While I thought everything was progressing, he was under the impression that we were not as serious and he had been seeing another girl since before him and I started seeing eachother. When I found out we stopped talking and eventually talked about the situation and while he knew he was wrong and was very apologetic, we still had never had the discussion about being exclusive so we decided to try to make things work. Now, four months into our relationship, I still cannot get over it and cannot stop looking through his phone, his social medias, email, etc. I even figured out his password and logged onto them. Deep down I know I can trust him and that he truly loves me, but I literally cannot stop looking through his stuff. It is almost like im going out of my way to find anything that makes it seem like hes doing something wrong to make myself upset. I always find something and pick fights with him about them and I dont know why i do this, because while some things are things i could be upset about, hes not actually doing anything that could make me think that hes being unfaithful. I want to stop going through his personal things and be happy, but i get these urges and I just cannot stop. I dont know what to do.

What you are experiencing is normal, it happens when we really love the guy .But if you want a long term relationship with this guy i suggest you let him know that you trust him.he may not complain about you going through his personal things for now, but believe me its not healthy for your relationship andd you are going to regret it later on.Try to focus on the the things which he does to make you happy,dont over analyze,Guys are really simple creatures,if you treat him right,im sure youll have a happy ending.hope it helps.good luck.