@Keaten That's something I've noticed about the said friends too. So long as you're miserable or worse off than them they'll talk to you but when you're good and content you're non existent to them. Or that's my experience at least.
@SW-User That has also been my experience as well. When I did actually find a good friend, they would just vanish as if they never even existed. That kind of hurt never seems to leave.