I don't believe in friend zones because human relationships are too dynamic and shit changes... But yes, i have liked friends who didn't feel the same way. Some are still around and some aren't... One told me she wanted to try things out between us (much too late, to my point about shit changing)

Of course

Yes, it was a hot but unhappy love to a fellow student who had a male idiot as a boyfriend. He cheated on her often, neglected her often and after uni he broke up with her. Almost everybody knew this but she was keen on not knowing this and nobody dared to openly discuss this with her. And no she simply wasn't into me that same way I was into her.

I always fancied friendship, so yes. But I don't think I'm still friends with them