if you do need help, go to someone aroung your age who you dont really know. Its way easier to talk to them than your mom or your best friend. And counsellors? Usually end up telling you stuff you already know.
You sound like your going through some kind of depression. I have had the same problem. Find someone to talk to. It feels better knowing someone knows whats going on, that they are there for you.
As for trust issues, most people have them to some degree. If your friend is asking your bf to the movies and saying she loves him, she probably likes him but doesnt want to tell you. It can be difficult with friends and bfs. If your bf was responding to this though he obviously aint worth your time. Coz he knows your his gf. And where did you hear that from? If it was from some one else they might be trying to cause problems, some people do stuff like that.
If the crying is because of people ,turn it around. If they are making you cry they really dont seem to be good for you. Turn and round and take up something like kickboxing or karate. It feels better to take out your problems on a punch bag. And you'll know how to defend yourself.
Anti-social behaviour can leave your friends worried. They will probably be concerned about you and wondering what is wrong.
Reading is good for you. But don't use books as an escape from life. Coz you have to come back eventually.
Low self-esteem. well. dont start cutting coz of it. Or carving/tattoos. Coz it may make you feel good at the time, but it really hurts once you wake up. Carving hurts when ran against zips. And people can call you stuff for it. which sucks.
Find something that makes you feel good that you can do with friends. Going to the playgrounds good. especially swings. if you find something that makes you feel good while your with your friends you can get outta the whole depression thing.
Take up hobbies or sports. They can stop you thinking about all the unwanted stuff in your head.
If you want to get your feelings out try poetry or short stories etc.
Another way to get things out is to write letters to yourself. I know it sounds wierd but it helps. You dont have to read them again, but you can, so you can see what you were like then, to understand. Kinda like reading a diary you had when you were 6.