Drapetomania (Came from the slave days, and was considered a medical disease which needed curing if a slave was wanting to escape. So, metaphorically speaking, this word can be used as a noun if you feel trapped and ache for escape.
I am so bad at letting go, but I guess i am a pro at letting it hurt. With you, I've been letting it hurt for a long time. I love you and I want to be with you, but I can't and you dont match my effort, but I can't muster the strength to let go