Hi, I have felt almost the same way and the past, and I still do at times. I'm terrible in group settings, but I'm a lot better with people one on one. I don't think it's you who's the problem, I think it's the people who you are hanging out with who ARE the problem. They sound like a bunch of stuck up hypocrites.

If one person can say the same thing and get a good response from other people, but it's not OK for you to tell the same joke or talk about the same thing, then that is a major red flag. They're basically trying to ignore you as they don't want you around. Sorry, but that's probably the case. If you act shy or awkward around other people, especially when they're outgoing, that might make them think that you're not friendly, or that you're aloof even when that's not the case at all.

Sorry, but a lot of people are to quick to judge and they often won't look past first impressions. Most people in general tend to stick to people that they have things in common with and they don't always welcome people that they don't know that easily into their group sometimes, especially younger people. Do what I do and try to hang out with people one on one or in small groups to where you know the people in it a lot better. You need to find new friends who'll like and accept you for who you are.

Try joining some groups at school or talking to other people that are like minded that you have common interests with. Ignore those jerks and move on. They don't have the guts to be direct with you, so they exclude you instead. If you're at least 18, you can join this free social site to where you can meet people in person called meetup.com. It's a great way to meet people! I'm shy, but even I was able to make a few friends from joining that site.