How to get over a guy

17F, so I dated a guy for 1 year and yes I loved him he was my everything. He has a female friend let’s name her Z Whom he had crush on 2 years before dating me, when he finally confessed his feelings still 2 years before Z tells him I hv to concentrate on boards 10th and dates some other guy. We infact bonded over discussing how Z mistreated him.

On my birthday I find out Z and him have sexted and Z asked him for nudes this guy was no less he asked her if Z squirts and shi. I forgave and give him one more chance.

So I was him out get over his addiction. 1 month later I find out he has a separate account to watch thirst traps. I broke up with him.

Idk how we end up back together then I find out he tried to flirt with one of his old friends and told her how intimate he was with me and shi in disappearing msgs. Srsly dude?

2-3 months he was begging me to get back together. I was still being nice and talking to him and declining. Out of nowhere his 14 year sis starts being rude asking me to not text him. I got so irritated I made my mom call her mom asking her to stfu as my jeeadv was nearing.

There r more small incidents where he had done much terrible things which r such a clear red flag. This was the jist.

I tried to do no contact, show chi her aukat and did a fwb I still can’t get over him. How tf do I get over him. Pls suggest something

Ps I got into one of the top 5 iit core branch with all this trauma happening along with the exams.