I also the type of person to wear my heart on my sleeve, and I get how it is tough for you. I can be very emotional and sensitive sometimes, which makes me an easy target for teasing. The group of people at school who hate you may seem larger than it actually is if you always focus on the negative. Either way, focus on the 10% of people who don't hate you. Chances are that they're much better friends and have their head in the right place. As for opening up to people so easily, it is the best to find a close friend that you have developed a relationship for a long time and confide with only them. Choose someone who will not leave your side no matter what. I am clingy and I naturally have that one close friendship and the rest of my relationships are not really strong, and when my friend and I get separated in some way, I tend to start opening up to anyone I can find. Always analyze your emotions, see how they are affecting the situation you are in, ask yourself if the way you feel is making things seem "bigger" than they really are, and remember that you can send a message to me or talk to someone you can trust.