Loving people who don't love you back really is awful. If it's any consolation, there's not a person alive who hasn't been there, or who won't be there some day. It's probably the most human thing there is to experience. The big reveal is that it's also really okay.
It's a big world, full of a lot of places and people and things. Keep plugging along, and you'll find plenty of people to love, and who know how to love you back.
The problem is, people are not interchangeable. The loss of those particular people, and the loss of the happiness they represented, is not something another fish can fix. Time doesn't go back - you can't replace two decades of parental love you never got, because you simply aren't the same person you were as a child. You can't just move on and get new friends when you've spent years learning about each other, shaping each other, and telling stories. Maybe you're just trying to help, but trying to hold out the hope of
some other happiness as a consolation prize just isn't going to do it.
It's true that you need to accept something, but I feel like you've got the wrong aim. It's not necessarily accepting that your feelings are okay. It's accepting that the
loss is okay. Yeah, you're going to feel like shit, but at some point what you've got to come to grips with is that this thing happened and the cosmic order stands unshaken and you're
going to get over it. And it's going to hurt and you will hate every minute of it, but you can overcome that pain and beat it instead of letting it beat you.
But that's a long term goal. Sympathy's the main thing that helps while the pain is in progress. Maybe you know that, and you've just unwittingly stumbled into a phrasing that I feel like causes more pain than anything else, while trying to offer that sympathy. In which case, my bad. It's just advice I've given before (probably recently!) when I couldn't think of anything better, and it always seems to make people feel guilty for not being able to take solace in those future, imaginary joys.
Sorry if this post is a giant overreaction in a place that really doesn't need 'em. >___>