Any advice on how I can help prevent my insecurities from destroying my relationship?

Anonymous
so boyfriend and I been together for 2 years. He’s a good guy, has put up with a lot of stuff most guys wouldn’t. Let’s me look through his phone, honestly he never really hides it. He will get annoyed if I wanna look through too much and snatch it back but for the most part if I’m just casual he will let me see what he’s doing no problems. When he goes out he will say who he’s with, where they are going and even send pictures if it gets too late. He has female friends that call or text him from time to time but again he doesn’t hide those and lets me know “hey so and so called me or texted me” but still I have this anxiety of worrying he will cheat and I freak out when he goes out to concerts for work and think he will take someone home or whatever and I can’t shake this negative thoughts. This has almost broken us up a few times and I know his patience runs thin. I’ve been like this in my past relationships but I had more reason with those relationships. My current boyfriend isn’t perfect by any means but in terms of cheating or being shady he’s pretty open and honest so any advice for me? How I can stop this behavior? Even with all his irritation of going through his phone often, when he’s on his phone in front me he will let me look with him navigating. Please help
Updates
+1 y
Also Instagram was an issue because I didn’t like him following IG models too much. Made me feel insecure. Or him following some girls he knew from high school bothered me too. He even rebeled against me too and would follow ig Models just because he knew. He doesn’t now
Any advice on how I can help prevent my insecurities from destroying my relationship?
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