Am i just being Stupid?

Leila
Okay so my ex and i(we are juniors in high school) broke up a few weeks ago after dating for a little over a year and before that off and on for a year. We were best friends in fifth grade and secretly liked each other. Anyways, freshman year i was a real fuck up and so mentally unstable and didn't really appreciate him. i ended up cheating on him(keep in mind i'm sober and i was very aware of my decision) because i wanted to sabotage the happiness i had. about five months later him and i started dating again and i was a mUCH better girl friend and i actually ended up falling in love with him and he fell inlove with me. Still, i was not completely healed and changed and i fucked up again(went to a festival got super smashed and a girl kissed me) but i lied about it for months and months. my best friend (whom my ex didn't like) ended up getting super pissed at me and told my boyfriend at the time the things i did. Which has resulted in his feelings for me to deteriorate. I'm trying really hard to get through this. and so many people said we were perfect and jealous of the connection we had. i feel like i've honestly changed and grown. Do you think it's stupid of me to think that maybe we will end up together again? maybe not even this year but senior year? hell, even college?