Am I the one causing the issues?

I found out my boyfriend had been cheating and lying about it most of our relationship. After everything has came into the light, we have been arguing left and right. He says the reason why he was seeing another woman was because all i did was complain and i didn't trust him and he was very tired trying to prove himself. He tells me that he isn't going to try to get me back because im going to want him to jump through hoops and walk on glass to prove himself. Sometimes i trusted him since we met because he will kinda do some things and his stories wouldn't add up. Other times I did trust him which is why i was having unprotected sex with him.

Am I the one causing the issues?
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