Break up after one year (I’m a senior in hs and he’s a freshman in college - he went to my hs)

Me and my boyfriend broke up after one year of being together and it ended over something very little and stupid. I’m not doing so well. Basically what happened because it’s a very long story is that wednesday night I got a dm on instagram from one of his friends and it was a post from this one girl’s account and she was showing off her body and I was very confused why i was sent it. So, I texted my boyfriend and asked why I was sent that and he was like oh thats so and so from my friend’s (the one that sent it) rival high school. I started looking at the girl’s profile and all her pics were of her showing off her boobs and her butt and I noticed that my boyfriend followed her and I asked him why and his answer was “because she’s hot”. I told him thats not really something you say to your girlfriend and it went back and forth for a while with no apology from him until he said this conversation is ending I’m going to bed. I was crying a lot and he called me that night and heard how upset I was and still hung up with no apology. The next day he texted me but it was just good morning and so I didn’t respond because I was still mad. Later that day he texted again and say the was there if I wanted to talk so I sent a really long text and he never responded. Then yesterday he texted saying he had to think of the right words to say but would talk to me when he got home. I told him I wanted to talk in person and he kept refusing to and made up excuses on why he couldn’t until he called me to break up with me. But, I didn’t let him break up with me and I broke up with him and went off on him then hung up, and I still haven’t gotten an apology over the stupid little thing that caused all of this.

I don’t know what to do.