Advice please 😞

My boyfriend and I broke up and mind you he's in high school and I'm in my first year of college. He was practically my first everything. First boyfriend, first kiss, first love, first sexual experience basically everything. We were on our 10th month anniversary And we broke up because I had mentioned (for like the 100th time) that I spend money on him all the time because I love him and he doesn't even have time to text me good morning. He used to call me every day and basically made me feel important and a priority. But out of the blue he straight up stopped. That's why I was upset about the lack of good morning texts.  I had also bought us tickets to go see a concert this weekend (I bought them in the fall) but we were in this dispute and I told him that I wasn't going to take him because he didn't deserve to go. And he got pissed and so we stopped talking. Then the next day he still wasn't texting me but normally when we fight he still would even though we were mad. So I took it as if we were breaking up and he actually said yes. He said we are breaking up because I brought up money and he told me he wasn't with me for the money.  I never said he was with me for the money. Anyways, long story short I'm still heartbroken and I made it worse by trying to talk to him the other day but it ended up in me saying horrible nasty things to him that I could never take back. I tried apologizing to him the next morning but he told me to fuck myself and blocked my number.  He also unfollowed/unfriended me on everything. Before he blocked me I had told him that I'd be here for him if he ever need to talk to someone. And he replied with "I wouldn't go to you even if I had no one else on earth to talk to". I don't know what to do. I wanted to write him a letter and drop it off at his house but I don't know it that'd make it worse. 💔😞