Why do you feel so?
You are also one of them, it's all about acknowledging your effort and working on something you aim to achieve.
Never belittle yourself.
think about this. may be you will find why you feel so. Do your parents often downgrade your attempts when you where a child and complain that you are not good enough?. Do your frnds find your efforts not much good?. surrounding onself with people who are very pompous and overconfident can make you lose self esteem. try faking confidence from now onwards. you might feel like you are becoming arrogant at first. but you are not. you are becoming strong and confident. your new confident form might make your frnds think as you are arrogant.
Yes... I was had a terrible childhood filled with bullyies, negligence and low self-esteemed parents. Maybe that is causing me to act like this