Can you elaborate a bit? I'd like to offer advice but I don't understand the question completely. I am looking for some context...

sorry about that like what i mean is what should i do to not feel as lonely and worthless?

No one is worthless. Alot of people are lonely. You need to get out of the house and do something. It sounds like you are more depressed which makes people stay at home and away from other people. Search for the place where you belong. Just do something and don't be afraid to make mistakes or meet new people. What do you like to do the most? Shop, visit people, art, music,children whatever it is you like to do. There is a place for everyone in this life. We just have to find it. I've been lonely,sad,depressed,broke,cheated on and lied to but still had to find a way out and so do you and YOU CAN.

I remember being your age and feeling very much the same way. I think the best thing I can tell you from my experience is to dive into some kind of activity or something that builds on things that you like and can (or are) good at. For instance, maybe you like to run -if you join a cross country team, it will help you to feel more of a sense of belongingness and to give you a big sense of accomplishment. They key in everything though I feel is to extend yourself to other people and be as nice and friendly (and upbeat) as you can -even when you are hurting inside. The more you can do things that you enjoy though, the more people you can surround yourself with that will be like you and you have a good chance of making natural friendships with.

When I was your age, I was so shy and self-conscious...to make it worse, we were as poor as dirt and I was always an outsider because of it because I didn't have the newer clothes, gadgets, toys, etc. I used to think I was so unattractive and that was why no one wanted to be my friend. I look back now at old pictures and marvel...I was not hideous at all! In fact, I was pretty cute! Thing thing that's changed between then and now is that I've grown more comfortable in my own skin; that is, I've learned alot about myself. My flaws, my strenghths, what's important to me and what's just superficial garbage. I'm telling you all of this because if I'd have known then what I know now, I wouldn't have been afraid to run for class office or try out for cheerleading or join the drama club. My point is, people will ALWAYS try to make you feel smaller than they are; it's the way of the world. But YOU have to know and believe your every bit as good as them, if not BETTER!
You need to change your way of thinking about yourself . Start by finding more positive people to be around. Get out of your "comfort zone" and volunteer at your school or church or local communty center. Join a group, like boy scouts. Or join a sports team at your school. If you limit your abilities, you'll limit the way you feel about yourself. Take it from one who knows, kiddo. ; )