I'm so sorry for all the stress you are going through, and for the friend who is the opposite of supportive. Of course you should go to ACOA or any other meetings that help you feel better!
Someone who wants you to just forget and move on is advising you from a selfish place. Your honesty and genuineness make her uncomfortable, perhaps because of issues she has not looked at from her own past. You are disturbing her denial, me thinks.
I hope you will find support and new friends at the other meetings, and I hope you will find some peace and comfort here on SR too.