A lot of questions in one, please help

Mm this is so hard. Please read and help. Kay so everything went down hill. I lost this guy I really liked because I cheated. Now he apparently has many people after me but then again who could he get I was his only friend. Now he apparently has a new girlfriend aswell. But I dont no what to say like I havnt talked to him for 2 days because I dont want to hear all the bad things he wants to call me. But like last night, well actually like 3 this mornin he wouldnt stop calling me and I wouldnt pick up but it was sooo annoying. And his sisters send me random text messages calling me a “dumb btch it gets really stupid, I dont know how to deal with this I just want him to forget bout me and I want to forget bout him. But he isnt letting go, so why is’nt he?? Is this all just to screw up my life or what is it he wants?

Then I lost one of my friends because she told me im immature sumtimes. As I said back well im aloud to joke around about things and not care because im 15. But she is 19 and way to serious bout things. So I dont know how to fix that. She is a really good friend but she is like calling me stupid now and what not, so how do I fix that??

I also got searched by cops at school for drugs, and they took 2 grams from me and they took my pipe and stuff and my school is like 60 people its really small and everyone hangs out with everyone. But the cops said they could charge me with possesion, but they are going to give me a chance to get clean. So now I have to go to a drug counselour but I dont want to I love to get high I feel so good and im like really happy when im high. But my mom is like tryna be a good parent and what not but everyday I went out this week I have been getting high and drinking and she doesnt know. I really dont know what to do for this??

I only really have one good thing happening. Im dating this other guy and things are going to work out. Excpet that I used to date him last year and he called me names. But I think it was more joking around. But sence then my parents dont like him. But I really really like him. But I dont know what to tell my parents so they will just let him be. They like never gave a sh*t before about who I dated but now it’s all of a sudden my ex I just dont get it. So what you think I can say to them to make them just leaave it all alone.

Please help.