My buddy is 5'6". He is 190 lbs., all natty and looks jacked.
Try working out hard and eating for a few years bro. You should be able to get to 175 (at least) with food alone!
IMO you haven't earned the right to use gear. I realize I don't know you, but I'm judging you based on your stats. I train with a chick your size. She can probably Deadlift more than you.