What to do about jealous/competitive uncle and cousin?

Sometimes copying can be the sincerest form of flattery to you. He def admires you but is too prideful to admit it and lacks self esteem to credit you for your achievements. So he feels the need to keep up with you and compete. My advice, ive dealt with this with my bff, as annoying as it maybe, talk to him about it. If he doesnt get it, distance yourself for awhile and live your life. Dont worry about it, like i said take it as a complement that you are someone, something he strives to be. Good luck.