If it is difficult at start to stop feeling angry, maybe you can start with externally changing your reaction.

After all, he is the one who wanted things to be this way, and he should take responsibility of this decision, and it is not fair for him to make You question if the decision He made was right or not. He cannot transfer the consequences of his decisions to you. If this is why you are angry, you are right to be. And the way to not give more into the anger is to set things straight, not allow yourself to carry someone else’s baggage. I think that setting the right boundaries will alleviate your anger and you will feel better.

Make him realize that you are acting according to his own calling. Be decisive with your desire to move on. Even if there is a place within yourself that feels that eventually one day this phase of him may end and you may get back together. Your decisiveness does not harm any such possibility if this is your destiny. But is the right thing to do now given these circumstances – he is making you sell the house…