It is very hard to get over these things, I know that; but never think of suicide; that isn't the way you can solve things. I know the depression these kind of situation causes, but you're still young, you haven't lived your life at all!
It's not OK to eliminate the problem; you have to solve it.
If I were you, I wouldn't use the phone. I would prefer meeting the other person "by coincidence". Get one of your friends that also knows him to hang out with him. When you meet him, try to talk personaly. I would try to find out what the problem about him is. Tell him how bad you want him and that you want him back.
Love is strong. If you love him, you have to be strong too.
However, if it doesn't work (it will work) don't fall. You must open your eyes and realise that the world is huge and full of oportunities.
I hope this helps you.
If there are any mistakes, forgive me, but I'm not very good at typing.