I'm not going to say anything about my opinion of you, because I haven't really talked to you long enough to get a good opinion. But I will give you some advice to help strengthen your self image.
1. Try not to brag too much, everyone loves to brag and you'll often find lots of people doing it, but sometimes it's just cool to not do it yourself. The only reason people brag, really, is to try and strengthen their worth to others and when others see that you're simply trying to make yourself look better to them, it may backfire. You can talk about whatever you want, but try not to force a good opinion of yourself to other by bragging, just talk about stuff and let it come naturally.
2. Be nice, compliment people on a few chances, help people out when they need it and they disagree with something you did, apologize. A lot of people think that doing things by yourself is "better", that is it's stronger, but I think those people are very wrong. It's much EASIER to be successful when you're doing it with other people, those who are doing it the hard way simply are being stupid, if you can do something then do it in the most efficient way possible. Being just generally nice, saying nice things and swallowing your pride when you need to will get you a long way, and when you need something done you can ask people to help and get it done easier. More people will be happier with you and you'll feel better about yourself as well
3. Take things as they are. Occasionally I'll see rants from you that seem a bit like taking a mountain out of a mole hill. It's good to appreciate what some people have done to you, rather than only see the bad things of people. You'll be happier that way if you just accept life in some contexts, if something bad happens try to improve it, rather than complain about it.
I have to disagree with Ulfur's last statement, Money can take you a lot of places in the capitalist world, those who have lots of money generally dominate most of the world. But, something that is MORE important than money in becoming successful is connections, that is friends. If you have friends in high places you're in a high place too! Money is limited and things can happen to cause you to lose it, connections last a lot longer and are a lot easier to repair once lost than money is.