I don't think he was too good for you, as you are not giving yourself enough credit. As for the original post, if you are not attracted to someone, you are not. Regarding the underarm hair, one might drop a subtle clue: Get him some nice Wahl clippers. Since he is bald, it would be obvious. You cannot rewrite his genetic code, and I don't think Wahl has managed that one yet, either. Therefore, you can't fix him being short or the other issue.