Sorry to hear that OP, that’s shit. Try looking at things this way now – this person has just smashed you to bits emotionally and is thinking only of themselves, yet you are putting them on a pedestal and trying to continue the relationship with them. Sounds a bit daft, doesn’t it?
Cut ties, communicate only when you need to sort something out with the house or whatever and get on with your life. They are not worth your emotional investment.
Time, as mentioned, is a great healer and it will heal more quickly than you think. All the best 👍