Tips on how to get over a break up?

i’m 16 and i just recently broke up with my first boyfriend: we were together for a year and two months, he isn’t in a good place and kind of took it out on me - so i ended it, but we’re in good terms.

the reason i’m asking for tips is: we have almost every class together and we’re in the same circle of friends, so avoiding him is absolutely not an option (and i don’t want to ‘cause he’s a good person).

what should i do??