Shoulld i take it as an complement?

im 23yrs old female,..short & skinny im often for 15 lol,..constantly have to show my id to state that i am sometimes it gets frustrating at times & i get tired of it because i feel like i should not have to well i know i have to in clubs and to buy acholic beverges in all but i cant help it because i looker younger then ppl think i am,.. completly hopeless right now because its between the good & the bad, need help to insure ppl that i am not a child like they think so, what should i do?