I understand your pain.

I lost a lot of self confidence with my last boyfriend.
He always was talking about how he wished at had my friends boobs and stuff. Because I'm only a 34A, which wasn't "good" enough for him, but he still wanted to be my bf and was always talking about how we're only thirteen and that they'll probably grow, but I got sick of him and and his topics and broke up with him a few days ago, though he agreed it was for the better too.

I'm now a lot happier and am happy that I'm free to date my best friend Will now, whom I've liked for 5 years now.

And don't freak out about your height just yet, my mom only grew to be 5'2" and a half and she's still the same height and has been married twice. And my step-dad is actually 6'0".
And my dad, her first husband, is 5'11". So even if you're short, as I am too, it's easy to find guys if you show them your true self. And believe me a lto of things can happen, and this is coming from a thirteen year a lot.

Try to be proud of yourself, it helps with the growing.