hi justrae-
mine replaced me within a month. that lasted 3 months and then he was back, all sad at my door. you know what he said to me? he said he didn't fancy her. never did. just didn't want to be alone and had to have sex.
it's not personal. it's part of their sickness.
i think it's healthy to cry and feel your feelings. and after i was done crying, i got into therapy to figure out why i would choose to invest so much into my relationship. that was eye-opening. the therapy was very helpful. i don't want to repeat that pattern and i needed to understand my half of it, which actually went back to my childhood and my relationship with my father.
do your crying and do your work. be ready when he shows back up, promising you the world.
best wishes to you,
naive