I don’t want a divorce

Please be kind.

My (36F) husband (34M) filed for a divorce last month. I do not want a divorce. We have 3 small kids (9, 4, and 2). In 2022 I found out he was having an affair with a coworker. In 2023, he left our home and moved in with her. In 2024, he moved back home. He says that she is his person and he wanted to build a life with her. The day after he filed, she told him to never contact him again and she no longer wants anything to do with him. I’m heartbroken. Never did I imagine that I would get a divorce. He says he wasn’t ready to get married and was pressured by family since we already had 1 kid and bought a house together. I had to respond to his petition last week and now he’s trying to rush the process without mediation. Idk how to begin to get past/through this. I asked if we could do therapy but he says his mind is made up 100%. My kids are going to be devastated when they find out.

Please be nice. I feel bad enough as it is.