My (M32) wife (F30) is moving abroad to “find herself,” leaving me and our two kids behind. I’m heartbroken and lost.

The title says it all. It started when I caught my wife exchanging explicit pictures with another man she met online. I chose to forgive her, but things didn't exactly go back to normal. Recently, I discovered a secret world she’d been longing for: she wants to move abroad to start a new life, and she admitted she secretly hates being a mother. When I confronted her to find a solution, it became clear she’s having an early mid-life crisis. She wants to "reset" her life with a new identity. Ironically, it wasn’t even her idea to act on it. I was the one who suggested moving abroad as a potential solution to her unhappiness, and she unexpectedly loved the idea. Initially, we didn't talk about divorce. We discussed trying a long-distance relationship or even an open marriage. However, I’ve realized I 100% cannot live with an open arrangement. Thankfully, she agreed to let our two kids stay with me. I have Bipolar Disorder, and these children are my entire purpose for living. If I lost them too, I honestly don't know if I could keep going. I’m struggling to understand how she could walk away from a 10-year marriage that felt healthy. We rarely fought, and even our kids would brag about having a happy family. I cried my eyes out last night thinking about everything we’ve been through. We married young. she was 20 and I was 22. I think she might regret marrying so early and feels she missed out on life. Regardless, I hope she finds whatever she’s looking for over there. I just don't know how to process this.