My friend is going through the toughest time in his life right now and I don't give a shit.
Is there a reason why you don't care about your friend's difficulties?
He took away my girlfriend and he was a bad friend to me
Whatever your friend did to you in the past, I'm sure he never meant to hurt you, and you would feel better if you forgave him. As a friend, you should be supportive and helpful when people are having difficulties, just as you would expect support from them.
He doesn't deserve my love.
I understand why you feel this way, but I think you should be the bigger person and help him out.