Unrequited love is a bitter pill to swallow, and it's one I think everyone has had to take at some point in their life time. I also consider this a very pure form of affection, because it usually does represent a sincere desire for another persons happiness over your own. It's just part of the human experience. Hopefully you'll move on and find someone else.
My issue is when people use the term "friendzone" with a sense of entitlement. It suggests that in order for you to do something nice for someone else, you expect something in return. In this case a relationship, or even sex. This strikes me as somewhat manipulative. It also tends to suggest that the object of your desires is just that- an object. They are a thing that you think you can posses instead of the real blood, and flesh, and imperfections of an actual person. It also suggests, as Archangel put it, that friendship is just some consolation prize. That is, in itself, insulting.
In all honesty, it seems unlikely that the girl (or guy) is ignorant about your feelings. If they really liked you in a romantic way then they probably would have made a move on you themselves. If they didn't make a move on you, or reciprocate your feelings, then they probably only ever saw you as a friend in the first place, in which case you never actually stood a chance with them at all, no matter what you did. They are either aware of your feelings, and don't share them, or they are unaware of your feelings, in which case they don't share them. Again, a bitter pill to swallow.
If by friendzone you mean unrequited love, then yes, that always sucks. It's also normal. Most of the time it seems to mean the second definition, in which case I don't have much patience for you. All I'll say is that the second you have enough self confidence to not need another persons approval is the second you'll finally be able to enjoy a mature adult relationship. To me the term has an ugly connotation, and I wish people would stop using it.
Edit: I wasn't speaking to the OP directly, just making a general statement.