I consider it unconditional love, if I've an ex, better to leave her as a friend with benefits than as a thorn on the road ahead. If I like a girl I like her even if she likes another guy/girl, is asexual, goes blind, gets a physical handicap, becomes a vegetable. I try to offer my help in any way I can, and I keep them in mind same way a fire fighter keeps a small girl in a burning building in mind or a father keeps his daughter in his heart.
I'm going to bring up the concept of "moving on".
You are assuming a lot thinking that someone who does not return your feelings will want you hanging around trying to be helpful.
If that person does, it indicates the person is a very manipulative and prone to exploitation.
You are indicating a very paternalistic and borderline messianic idea of what your love is supposed to be.
I'd say it's maybe at least slightly unrealistic.