I feel the same way you do, don't feel that you're alone in this.
I do think however that that breakup with you and that boy played a huge role in the way in which you feel and may have led to social anxiety disorder (http://www.socialphobia.org/whatis.html). This is very serious and should be resolved ASAP because it takes so much out of you and affects your social life all so much.
I myself suffer from this as of right now and have been addicted to the internet, isolate myself from friends/others and have skipped a whole YEAR of highschool because of it. It's led to depression which makes matters alot worse so I'd suggest that you visit a therapist before things get any worse.
i talked to a school counselor and now im being treated for clinical depression, and ive stopped cutting. im not gunna lie. it wasnt easy. at all. and every time i see something sharp i think abt it..but i think ill be ok..i hope. eventually.
Avsolutely you should talk to someone. A school counsellor, a doctor, your parents.
High School isn't hard as such but the social life can be terrifying. People form into little groups and exclude people for no valid reason which hurts big time and they often form their own groups to get back at them Hate groups really.
It's a big shock for many of us who don't want to play those silly games but they are for real aren't they. And they mean to hurt.
It's actually not much different later in life, like me, either Dazed so mostly society says to us "Get used to it or sink".
That's a dreadful way to approach life and our integration from level to level.
I had a couple of problems too but was lucky enough to have a few solid friends with me at the time.
I found the key to surviving all that childish behaviour was to be strong, believe in yourself and don't get involved with those who would use you.
I'm sure you can tell who is a user and who isn't. So just cut the users out and concentrate on being friends with the others, some of. Life experience tells me that most people have probably less than 3 real friends throughout their lives and later it's lucky if you have just 1 you can always **** on. True!!!
At school people mistake hangers on for friends but they mostly are not friends at all. Just hanging out rather than being alone. That's OK to do too as long as you don't let yourself down.
As to talking to someone, Yes, it's a must for you. Whatever cutting you are doing please stop now, at least until you see someone.
I see a lot of women who have cut themselves when young and you know what they all say "Why did I do that? How silly was I?" Not that easy but they all grew to know it was simply scarring their bodies for later in life.