Loving people who are apparently impossible to love.

[APeacefulWarrior]

Strictly speaking, forgiveness is the answer. I doubt that's what you want to hear, but as long as you hold onto the pain in your heart, it will be a very slow road to healing. I'd suggest trying to understand them better. If not agreeing with what they did, at least understanding why they did it. Or considering the pains which they must be suffering as a result of their (presumably) poor karma.

I know that this probably isn't an optimal answer, but it's not an easy situation. I suspect that learning to love the "unloveable" is one of the great challenges for 4D growth while on Earth.