Search Results: forgiving after cheating

so my boyfriend cheated on me. not physically bcos it was long distance but emotionally. he exchanged flirty texts with her, called her everyday and ignored my messages. he also lied to me just for her. his reason was because i was too busy with school and he had to find a way to occupy himself or else he will miss me too much and be sad. that was 1 month into the relationship and i know im dumb but i forgave him after he showed that he is really sorry and sincere to change. (actually 6 months after, he did something similar that hurt me but thats a different story) anyways after we got back together i still frequently got reminded by the past and threw fits at him and got angry. but it's because i was really hurt and angry that he actually did that to me. he then got angry because he thinks that I'm holding on to grudges and bringing up the past even though he already apologized and is trying to change. im just wondering, am i wrong for being angry and scolding him even after the issue ended? (sorta but my hurt hasn't end) and by being angry that i "brought up the past" does that mean that he's actually not apologetic for what he did? like why would he even be angry that im angry that he cheated on me...