I think you whine a bunch and just called me a 12 year old for telling my friends to grow a pair. If your friends didn't want to continue being friends with you because you told them you had feelings for them then you probably continued to make it awkward. The structure of the relationship may change, but you can certainly keep them as a friend if you put some effort into it. No one said it was easy and it shouldn't be. No good relationship is easy anyway. You pretending that people/relationships are black and white and the situation is simply "yes or no" is silly and something "only a 12 year old" would do. If the girls acted this way then they were/are most likely immature as well.
Also why do you want to be friends with someone in the first place with whom you have feelings for and they don't anyway. I don't understand this idea that it's better to be in the"friendzone" than with her or without.
And if you can't be arsed to search a reference then why bother even posting? Just because women want a challenge doesn't mean you can't be nice as well that's just asinine. There is a difference between being nice while courting and being the friendly nice. Don't give off misleading feelings if you don't want that to be how she thinks of you.
Insulting people because you haven't been successful is a very off-putting quality by the way.
Sorry about going so off-topic, I just don't understand how anyone can say relationships/people are so black and white.
OT: OP I really hope you actually go through with that suggestion. Sounds hilariously amazing and would be funny (for you) to see how he would react.
I don't know a single person who would want to be friends with someone who just confessed to having feelings for them if those feelings are not mutual.
Its too much of a burden being friends with someone who you know wants to get in your pants. You have to continually watch and adjust your behavior around them to make sure you're not leading them on or giving them false hopes. The other poster was right, once you drop the feelings bomb, in the majority of the cases you go binary - either you score, or you lose a friend.
As to your second comment - I agree. Whoever stays with a person out of a mere hope that he/she will ever view them in a romantic light if they haven't before is doing themselves a disservice. It may happen..eventually, but you'll always know at the back of your mind that you were always a second...third..or last choice.