I remember those years. They were extremely difficult. It gets easier with age, because older people are more focused on things like work and family rather than popularity and other trivial matters (usually).

This has helped me start and maintain conversations:

People love it when you show interest in them. Topics like hobbies are great discussions since most of us have at least one. Hobbies make great conversations because they can be very unique, such as making crystal sets. People love talking about their pastime(s).

Sorry, I don't know what to suggest about the anger.