I just want everyone to know
KieranJupe, it sounds to me like you are giving up too quickly on the friendships you have. Sometimes friends get angry at each other and may even stay angry for a while. That doesn't necessarily mean that the friendship is over. I would suggest:
1. If you think you did something wrong, apologize for it and say that you value the friendship.
2. If that doesn't work, try waiting for a week or two (or maybe even longer) and then see if your friend wants to do something (with you) that you know he or she enjoys.
3. If you just can't save the friendship, don't worry about it. NTs can behave in VERY strange ways at that age. If someone has been your friend for a long time and then can't forgive you for an occasional social blunder, that has far more to do with THEIR immaturity than any fault of yours. We all make mistakes, after all.
A great way to make friends is to join clubs or groups that are related to activities that you enjoy. Most friendships are ultimately based on common interests -- so, if you join groups or clubs related to your interests, you will likely meet a large number of people that share your interest. That increases your odds considerably. If you like computers, for example, try to find a computer club or take a computer class. This can be particularly effective if you are very knowledgeable or talented at something. Many people respect talent, particularly if they are interested in the topic.
When I was a teenager, for example, I loved chess. I joined a chess club and found that I had talent for it. I ended up making a huge number of friends, many of which are still good friends of mine 25 years later.
Anyway, I lost another one today, kicked her in the face during Trampolining (accident), so now it's down to 3. And I lost my girlfriend about 2 weeks ago
