How should I fix this feeling?

So the other day I messed up bad. I love my boyfriend soo much but the othr day when we were hanging out he took my phone and wanted to look thru it. I had a note talking smack bout my boyfriend. it was because me and him got in a big arguement and instead of taking it out on him I just wrote down the things I hate about him. I immedietly took the phone and deleted it quick. I know it looked so suspicious. hes been so good to me and I know hes not doing anything bad and hes honest with me. he didn’t look mad or anything. then he was ganna look at my pictures. I remmembred I had pictures of guys[3pictures] from months ago. I knew he would hate that soo I had to fight him to get the phone back. he won of course because he tickled me. I gave up. he saw it and I could tell he was a little mad. he told me that since I have pictures of guys its okay for him to have pics of girls. but I dont want him to those pictures were so old. I think he doesn’t trust me at all anymore. he always thinks im cheating on him with a guy. he hasn’t talked about it but what can I do!? I want to reasure him that hes the one I love. always and forever. plus im always getting mad at him randomly because I think hes cheating or sumthing, but when I looked thru his phone there was nuthing there. nothing suspicious or anything. I know we have a little bit of trust issue. but if he saw in my heart how much I loved him he wouldnt question it. I was surprised he didnt say anything. damn I just want to show him hes the only one. I messed up once and he did too but its been months since that and everything has been soomuch better. hes going to college soon and im soo insecured. I feel like im not enough for him even tho he tells me I am.