I need help socializing...?

in the last 5 6 yrs i have spend my life feeling inferior, wishing and defeating ....there was some good time 2 yrs back wen i changed school but now schol is over ,i feel terrible about it...and i feel like a total loser ...in all these years i jus made my self look fool(mean it..embarrased mny times)...i am shy,not so pretty.being teen i look underage(around 4 yrs younger..ppl dont look up with respct often) i had always hampered me..lifes all messy.i am never on time,i don eat properly,my facebok acct is almost inactive,frnds r added for sake ,no1 comments,responds ! i cant get along with my cool cousin n her frnds..sometimes i strive to do things i like...but my parents insists its time i take my career seriously,i am hardly paying attention to it...but i do care!!i have to gain a proper status in future !!jus help me make frnds...i talk but dont have comfort level...tips to manage all this fuss,get known ...how not to care too much..and stuff ...any advice to make it better..thank u...i ll really appreciate ur help