Is 5ft 8 too short for a girl?

I don't know why but I'm really insecure about my height. I'm 5ft 8(like I have mentioned above), so everyone says that I'm tall and some of my friends wanted to bi#! hslap me in the face for saying this. I honestly don't know why but I've always felt short. Whenever I see a 6ft tall female model on television my jealousy grows.!! I have been thinking about getting a surgery to elongate my legs but it's too damn expensive!! :(
Is 5ft 8 too short for a girl?
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