How tall will I be?

There is no way to determine the height you will be by looking at your parents height.
Your DNA is the only determining factor in what height you will be, although your parents give you the DNA they don't just give you their's.
My father is 5'10" and my mother 5'6", however I am 6'5". This is the same height as my grandfather.
In the next 3 years you will stop growing (it might already have stopped), whatever height you are at the end of that is what you will be. It's not a bad thing to be 5'8" (this is my 16 year old sons height), it's just a part of what makes you.... you.