>>4
smacks forehead
Despite what you see in television and anime, saying "I love you" like that is a huge turn off to a woman. You'd have to be in a relationship for that to actually work, and even then, It's usually better if she says it first.

I shall note your mistakes.

1. You waited too long. By waiting, you unconciously send a single to the female you like that friends is as far as things are going to get. They automatically put you in the friend zone.
2. You said I love you. WRONG. as described above, don't ever do that to a girl when you want to start a relationship or just date. It sends a signal the women that you don't want them to have.

Now, what you should have done is simple. You should have asked her out on a date. This shows interest, without coming on too strong. But chances are, you would have been stuck down anyway, since you are most likely in the friend zone.

Don't persist either, just give up and go after another women, there are plenty of them out there, They won't bite.
Persisting after that one girl will just mean she will hate you more and more, and by then, you won't even be friends.

Give up, move on. For both your sakes.