I don't think changing groups or activities will change anything. I think I have a sense of inferiority which affects my self esteem in every thing I do. I feel that I'm not an interesting person. I don't have hobbies, don't play music, don't know the culture and areas where I live in, ... etc. Disagreeing with people has noting to do with it. I tend to speak about serious topics, though. That's maybe something boring to most people. But overall, it's a challenge to initiate a conversation and fit myself among people smoothly.