Unloyal or Overreacting

Hello, me and my boyfriend have been together for kind of a long time- throughout high school and some change. The timeline of our whole relationship is that I’ve been super avoidant (for example not texting him and ignoring him for days) and honestly treated him bad for like the middle two years of our relationship when he was still trying and treating me good. I’ve taken accountability for this now, a lot of it had to do with immaturity and also the fact I wasn’t ready to be in a long term relationship. (Now I am and actually involving myself in the relationship a lot more) Because of this, he ended up not being able to take it anymore and broke up w me two times. One a little while ago, and one a little more recent. During those two times, we were still talking after the break up, and he told me during them that he would still be loyal to me, etc. I then later found out that he was talking to a girl/ had hung out with one each of those two times. (Not the same girl) We have moved on now because it wasn’t very recent and I’ve came to accept it, and he’s been able to answer all my questions,etc.

I just want to know if me feeling betrayed for that is just me being selfish. I know that he technically doesn’t owe me loyalty when we’re not together but the fact that he was lying to me hurts me the most. I do feel like I am overreacting a little bit, I need a reality check😅😅!!