Is 4'9 too short?

YesIm4Foot9
Hi guys!
So basically as the title says I'm 4'9. I'm 18 years old and have no chance to grow. My parents are 5'3 and 5'11 and I have a 5'5 13 Year Old sister so I have no idea why I'm so short. I have perfectly normal proportions and I'm super skinny.
But compared to everyone else I'm so small. In school I'm shorter than the Average Year 7 (Grade 6) and compared to friends I'm tiny. I feel I'm also too small for boys to go after me, as they see me as a kid. What can I do about this? My friends who are like 5'7 and average make fun of me light heatedly but it's so annoying as I look like their child I'm so small. I regularly get confused for 11 year olds and my sister makes fun of me a lot.
So am I just too short? Is there something I can do to change this? Also I'm quite sporty so what sports are good for people my height?
Thanks
Is 4'9 too short?
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