It’s no surprise that the most influential factor that affects one’s height is family genes. It is generally safe to assume that we will grow to be roughly the height of our parents. Bear in mind this is not always the case, as height is a polygenic trait, and is therefore influenced by several different genes, not just our parents’.
Remain hopeful. Having short parents does not necessarily guarantee that you will be short, just as having tall parents does not guarantee that you will be tall. If many of your relatives on both sides of your family tend to be short then the chances are not in your favor. However, if this is the case, do not worry too much about it, as it is still difficult to determine one’s height before reaching adulthood.