You said your parents at 6ft? Because your parents are that tall doesn't mean you will. Yes you had higher chance but you probable got the short genes from them. Like both of my parents are tanned skin but I have porcelain skin =). Sadly with you been 19 you have likely to stop growing all ready. Woman tend to stop on avenge by the age of 16 and men by time there 21!.
Be proud be short! I am and love it! I'm little but taller at 5ft3 but to honest I would not mind if I was shorter ^^