First, I would teach young men this principle:
1) Happiness never ever depends on what somebody else does, such as date you.
Second, I also wrote this a while back: http://www.reddit.com/r/changemyview/comments/2g0y5v/cmv_i_have_sympathy_for_the_stereotypical_nice/ckewh9n
And I would add this:
A lot of men feel they need to be "nice" or do something special in order to get women to like them.
What they need to do is suffer for them. Suffer by refusing to be creepy, suffer by refusing to demand sex or affection, suffer by restraining oneself from demanding something of a woman that it isn't her job to give. Because men only do those things to meet a need, and it is painful to let it go unmet when it seems like one of these options might help. It requires willingness to go through that pain in order to avoid taking it out on women.
Men naturally want to love women. Being "nice" is a perverted manifestation of this; it gets perverted when men don't have a choice in the matter because they need women so much. A man may already be willing to sacrifice himself in that he is willing to 'do anything' for her, but that sacrifice isn't real because it he isn't doing it for her -- he's doing it for the part of himself that needs her. So rather than sacrifice his dignity by being her willing servant (or her stalker), he must sacrifice his feelings by refusing to try to meet his needs through creepiness and neediness.
Taking responsibility for his needs will give him self-respect and set him free. Then he can love and serve women all he wants, just for fun, rather than in order to get a particular reaction.
Third, one of the wisest young women I know gave me the best formula I've ever heard for "Intro to Dating" for men:
A man needs to communicate two things to any woman he is interested in:
1) that she is safe with him, and
2) what his intentions are.
Make her feel safe, and make sure she doesn't think you just want to be friends. This is brilliant. Creeps fail number 1, "nice guys" fail number 2. Fail neither and doing very well.