Accepting yourself's easier said than done. No matter how much someone tells a man that bald can be sexy, it won't help if he doesn't believe it himself. Since Chipopo's so young, the most important thing right now is to stop further hair loss.
There's certainly no guarantee to many of the solutions but in most cases, Rogaine/Propecia can restore hair dramatically in a young man. They can at least stop the hair from thinning further and in most cases much of the hair is recovered in someone that's just lost hair recently.
However, a hair loss patient has to have realistic expectations. Even with those medications, it won't be possible to get back the hair that he once had as a teenager.