"You've Got a Friend"

Well, friendship is the hardest problem of mine.
I don't know what had happened to me recently.
About how I couldn't control my emotion. About how I treat my friends.
You know what my teacher wrote on my report card? She said that I have to be more friendly to my friends. Cool, eh?
I just couldn't handle myself.
I'm easily angry whenever they say something that I don't like.
I'm not used to be like this and I really don't know what had hit me. Gah, I really miss my old me. Cheerful, more friendly, less anger and of course, less problems.
I'm totally lost my mind and I really want to change. Can someone help me?
I was mad 2days ago. Simple one. I got jealous with someone. Well yeah. I can't tell about it here but... you supposed to know how does it feel. When someone (who's important for you) care about others but not you. Or maybe, they care, but they didn't want to show it to you. It hurts, trust me. You will feel like no one cares about you and you can't fit in.
I gotta say "sorry" to all my friends, and for those who have ever been hurt because of me. I had no intention at all. So sorry, and I hope you'll forgive me.
I just need a real friend right now, who will always be there and whisper to me, "You've got a friend, don't worry." Maybe I'm a bit selfish. But this is what I need.
Someone who can take my pain away. Someone who can cheer me up and cry with me whenever I'm sad. And someone who would like to share everything to me. I used to have someone like this before... But now, I lost him.
Every night, I always pray to God that one day he'll be back. Then, I'll wait. Miracles do happen.