high school can be a very unusual social environment. don't let it effect you too much and realize that life is very different after school and you are very likely to meet some like minded people and make some great friends when you leave that environment. i have seen this happen MANY times.
some suggestions would be;
1. focus on creating a great life for yourself without friends. by making your life better and interesting, you will become better and interesting which will in turn increase your social skills and friendships
2. get a job or two. working will provide a different setting to meet new people and to meet different types of people.
3. study social skills, communication and friendship. read 10 books in each of these areas and make distinctions of how you can improve your situation and then practice and apply what you learn.
4. find an excellent role model / mentor and learn from them. find someone who has the social skills and friendships and study what they do to create this result. if possible, ask them to coach you.
5. set small goals and build on them. don't unload your newfound social skills on everyone at first. instead take gradual steps towards your goal. feel good about your achievements and build on them.
6. focus on being a giver (but don't overdo it). instead of looking at what you will gain by having more friends, look at how you can contribute to others being their friend. be a listener, be supportive, be funny (give laughter and joy), be positive, be inspirational (not drinking and smoking is a huge inspiration in my opinion. also, look out for people who might, like you previously, need a friend and make them your friend and in doing so creating great joy for them.
7. hang around girls / get a girlfriend. girls are some of the warmest and most socially skilled people on the planet. make friends with girls and bring joy and fun to them but also ask for their help in improving your life. girls rock!
I hope these suggestions help. let us know how it goes
