Well, it can't be helped since "You don't talk to me, I don't talk to you" kind of people are usually introverted. If you think that person who has that kind of attitude are worth to talk to, do it. If not, don't bother.
Bullies are a problem in every schools. Either you run away from them, or beat them up, or call the cops to catch them. Avoid them if possible.
Not athletic? Hmm... Why don't you try basketball or something to get some new friends? It usually helps you to get friends even if you not athletic.