idk just venting

Hello, I juste felt like venting here cause i don't wanna anoy any1 i know irl. Ok, so a few months ago I started liking this guy. He is one of those guys that has like 3 new girlfriends a week. It started of simple. I would juste get this bubbly feeling when i thought abt him. Bus one day i asked a friend to tell him that i liked him. guess what. he rejected me. at this point i was already pretty much obsessed with him. I thought i have to become more pretty. I started using make up and got really insecure abt my body. (keep in mind I'm only like 13 so there aren't a lot of ppl iin my age rlly using make up and shi) I kept bottling up all of these emotions and I told no one that I felt the way i felt. I just kept making jokes abt it.More friends asked him if he liked me but he juste kept rejecting me. This hurt my ego and made me even more insecure. (I guess it wasn't really his fault that he didn't like me but it still hurt) So one week the whole class and another class of my age were together for some disco or something . A friend of me kissed her bf(I love this friend but the guy she is together with juste kinda came out of nowhere and she didn't have to do anything for it and I just got rlly jealous because I went through all of this for nothing) So anyways that night i just snapped.I was done. Me and 2 friends were talking abt our problems and then i told them abt this. We were crying and some guys noticed and then we wre crying more lmao. Anyways i don't like that guy anymore but i like some1 else and I'm scared that this is going to repeat itself