I don’t usually get too upset by a lack of reciprocation; it’s more indicative of the quality of the person. “Gained insight”, if you will. And some people are just aloof, or the same things aren’t significant, etc. Some empathizing is important for realizing where the shirking happens.
This problem is similar to the other I commented on, where I think you’re too reliant on input from others. That’s not to say your feelings are wrong, only that as long as you’re that sensitive to what you receive, you can expect turbulence—that’s just how life is. The way out of that is to build up your own world in a way where the disappointments others bring aren’t knocking you off center.