Everyone's conceited on the inside whether we can manage it or not... however, I highly recommend you stop being conceited on the outside and stop showing off!! And this can come in many forms... if it seems like you are showing off, try to cheer up the people you talk to then. :)
Don't show off your intellect, your wealth, your actions, your antiques, your writing, your school grades, your girlfriend/boyfriend or anything else of such! You appear as a conceited fuck who cares about nothing but his/her own selfish interests. You pass off as a horrible friend and one no one would rather hang out with. To be really friendly, respect everyone's own collection and way-of-thinking, even if you are technically higher in a position, you shouldn't boast on such superiority! Show them how they can do it also, how you did and help them learn!! Not doing this, creates a hasty environment and relationship between you and others, and if everyone in the world were to this, the world would be a much better place!
Have a great day people, and have a silent walk at sunset today, visualize your whole life ahead of you, and how glorious and lucky you are to live in this life! It all starts with a grand smile!!!!!!!! :D
TLDR, please don't show off anymore (try your hardest) and if you must, at least guide others to the position to where you are, it will benefit you more than you think!! :) ENJOY!!!!