Hi Kat,
just reading a bit of your thread. I think you are doing everything possible to take care of yourself. Healing takes time. It doesn't seem possible, but I have passed thru this experience and like the woman you met at the bank, I know that it's possible to move on, to learn from, and let go. The pain really does end, I have zero feelings for me ex at this point. Well I can't say zero cuz I do have some lingering disdain. Wish it were complete indifference, but I'll take some residual negative feelings to what I went thru when our m ended.
Your parents are terrific.
Good luck to you