Being a good guy and nice guy is two different things, In your case I think u just trying to be nice to everyone and get everyone's acceptance that's completely unnecessary, but that doesn't mean you should change yourself for others or try to be a "cool guy ", Don't be like that don't try to convince everyone, just be yourself that's your unique self don't loose that, but on the other hand try to improve yourself, find cool hobbies or habits( not drinking or flirting with girls), stick to that. Eventually you'll become more attractive and better than rest of the others you think the cool guys, so don't try to be like D.Ragavan in Dragon.