Resentment in my relationship

This is the follow up post to my poll.

Our relationship in the past was really struggling. I spent the first two summers of our relationship visiting family out of state. About 3 years ago during the summer (our 3rd summer together) he broke up with me. He spent his whole summer with his friends and with a girl, that he claims he had no romantic interest in. When we got back together, I shared with him what I had done during the break and he shared that he did absolutely nothing. Just hanged with “the guys”. Never mentioned the girl. The only reason why I found out about the girl is because I saw a missed ft call from her at 8pm while we were out. I know the girl, we used to all work together. I had no idea they were even friends. That’s when he wanted to be “open” and say “yes I was picking her up so that we could go out places BUT it was with all of my friends, never alone”. The year after that, summer came around and he dumped me again. When we got back together I shared with him what I had done and he said he did absolutely nothing. That was a lie. I found out that he was messing with another girl that I also know. The fact that I did not like her and he knew that, made it 100% worse. Spent the whole summer with her, was posting her on social media, taking her out with his friends, kissing her and touching.. but that was “not” his girlfriend. He only shared this information after I asked several times and found pictures in his phone.

Now.. MY PROBLEM IS NOT WHAT HE DID WHEN WE WERE NOT TOGETHER.

My problem is that he did more for them then he ever did for me. He never took me out with his friends, he never posted me, every time I made plans for us he would either cancel or couldn’t be bothered. He wasn’t even following me on social media but he was following them. That’s what I resent. Also of course the lying. I’m really bothered but I’m trying to work through out it, I just don’t know how.

This is the first summer we’ve spent together in our almost 5 year relationship. (We’ve been back together for a year). We did spend time together but that’s because we live together now, and 85% of the time was spent in the house. I’m not sure that I would’ve seen him often if we didn’t live together.

@Molly: He asked me what I had done and I was honest. So when it’s my turn to ask, yes I expect answers and honesty. I also do trust him, I just don’t understand how he could do for them but can’t do for me? Makes me feel inadequate.