Is this something to break up over?

Hi, I am 17 and in a long distance relationship. We have been dating for I guess a year (only five of those months were long distance). Well to give some back story, in June of last year we broke up (for approximately 2 months) because his dad didn’t like that he was dating a Mexican person and my mom didn’t like that his dad was racist. My mom made me break up with him and him and I agreed that after high school we would date. We had a couple of miscommunications so sometimes we would go weeks without talking to each other. During the last week that we didn’t talk to each other, he thought that I was lying about the reason I gave for breaking up with him (that I just made stuff up cause I didn’t want to be with him) so he was really sad. He went to a couple of parties and drank and during the last party a girl gave him head. I didn’t find out about this until last night. And now I’m really hurt and I don’t know what to do. In January I lost my virginity to him and I was under the impression that it was his first time too. I don’t know if everyone counts oral as losing your virginity.

I trust this person more than anyone I’ve ever met. And I know that he cares about me too. I told him about violating things that happened to me when I was 8 (which my parents and friends don’t even know. He’s the ONLY ONE). When telling him about this, he cried because he couldn’t stand the idea of something like that happening to me. He used to skate miles just to get to my house so that we could hang out. And he saved up money to buy a plane ticket to see me.

The question is not if he cares about me, I KNOW he does, but he kept it from me for months. I asked him why he didn’t tell me sooner and he said that he didn’t think I needed to know.

I’m upset and I don’t know what to do. Do I really want to throw all of this away because of something that happened when we were broken up? But we did have an agreement that we would wait for each other...

I know that no matter what happens, I will survive this. I don’t need him to live. I just really really want him in my life. But SHOULD he be in my life?