Hell nah. Trust me if a guy rejects you just because he thinks your abit tall, then hes defo not the right guy for u init. Dont feel like your too tall or anything, just be you, you dont need to make yourself look different for guys to notice you. And if anything, concentrate on GCSEs, not boys lmao (im guyessing your doing them this year from the fact your 16 lmaooo)