Please help me find the words

[Tiredoptimist]

I have been separated for a few months now. Left the house a few weeks ago. Renting a small place, sharing custody of ds (nearly 13) and couldn’t be more broke but doing fine.
Stbex has problem with alcohol and is very paranoid. He has not coped and behaved awfully since the split. Really Jekyll and Hyde.
I would like to move on and have told him it is over but he isn’t hearing it.
This week I am being bombarded with messages saying how much he loves and misses me and will do anything to have me back. Can never move on etc.
I feel horrible. I just want him to go away. I have to tread carefully as he has ds currently.
Should I ignore, reply or what? How can I be firm but kind.
I definitely don’t want to get back together, ever. I feel oddly scared.

I would be concerned about him abusing alcohol when your DS was with him. But that notwithstanding, I would ignore the messages.

I'd ignore anything emotional/about the relationship, and when you have ds back home, perhaps block him on the phone/sm and just have email communication.

I assume you've heard him out and had "The Chat" so he has felt heard and respected? If so, I'd reply saying that you will only be communicating about your child and any other messages shall be ignored.

Last time we talked I said it was over.
He conveniently forgets these conversations.
He seems convinced we will get back together.
If I write anything it is twisted and deliberately misunderstood. I guess ignoring will send a message?
No idea why I feel scared!