I feel so awful...

I don’t know what got into me. I was just laying in bed scrolling through Instagram and I got this sudden urge to just go through my boyfriend’s Instagram. I knew his password so I logged on. I didn’t find anything. I wasn’t really looking for anything or maybe deep down I was but I don’t want to admit it. I feel so horrible about it and I don’t know what to do...I feel like such a crappy person 🙄 I know this means I have insecurities with myself and my relationship but we have had issues in the past regarding him talking to other girls/ex’s in ways he shouldn’t be. We broke up for a year and got back together and it’s been amazing but I still can’t fully let everything go...I don’t know what to do. I’m desperate for help because I shouldn’t have done that...