Focus On Yourself
There will always be someone better than you. So what. Your are where at, your relationship, your career your whatever, because you stepped up and put yourself there. I've seen plenty of people with a skill for selling themselves. Others who are very skilled in their profession who who couldn't sell water in the desert. Big deal. Don't worry about were you are in relationship to other people. Focus on yourself, your skills. Realize where your strengths and weaknesses are and own up to them. If you're really bad at negotiating with people then learn to do it better or find someone to do it for you.