bro how old do people think you look, serious question. i was 20 and looked about 16. i was 5 10 at 16, then 6 foot at 19, when i was 21 i grew again to about 6 3 and a half. just wait, find out if your plates are shut, very easy to have done, do not touch aas they will close your plates. 5 11 is good though bro. you can have a great symmetrical build at that height.