I've been with my boyfriend for 2 years and 4 months. He started college this year and I'm still in my junior year of high school. Since the first weekend of October, I started talking to my guy best friend a lot and ended up developing feelings for him. He says he likes me too but I don't know what to do. I want to go out with him but I can't seem to break up with my boyfriend. I've tried breaking up with him for being to controlling more than 5 times already. He's almost committed suicide every time. The last time which was Sunday he told me to take him back and that he'll change and not be as controlling anymore. I told him no and he told everyone to tell my best friend to back off from me if not something bad would happen. He told his mom to call me to try to talk to me about it. I don't know what to do. I like my best friend but I love my boyfriend too. Can anyone help?

You have a lot of stuff going on and are probably in a vulnerable state.
I don't think you should get back together with your boyfriend unless you are sure that you want to be with him and only him, no matter his flaws. But I also don't think you should jump into another relationship so quickly because there might be a lot of bad consequences to that.
If you are afraid that he might try to hurt himself then you should talk to either your parents or his because it's not a normal behavior and you would know you did something to prevent it.
You can't control what he'll do but you can talk to his parents and they can help him the best they can.
In the end it's completely your choice what to do but be sure about it.
Good luck! =)

If you no longer want to be with someone, then breaking up is the best way to go. Do it no matter what, if he commits suicide is not your fault, that is something you cannot control. And if my experience has taugh me anything, more likely than not, he won't be able to do it, especially because he is controlling, and controlling people don't like to lose control!

Your boy friend is manipulating you and it is selfish. That is enough reason for you to leave him alone.
You two are on two different pages. He needs to be concentrating on College and you need to be concentrating and enjoying you last years of HS.
You don't stay with someone out of fear they will hurt themselves.
This relationship is dysfunctional. Time to get out.

Call his mother and tell her you are leaving him for good, and tell her he threatened suicide, and let her deal with her son, and you get help for yourself, before you date again.

That's not right of him, and that's not a healthy love for you.