Hello, if you were in my place, what would you do?

I have been married for 20 years and I have 2 pretty daughters, and I learned that my husband is cheating on me, well it's not new but this time it's too much. for two years now he has been on his phone all the time and acts aggressively when I ask him what he is looking at, he has two phones. My daughter, the last one knows the password to both phones and leaves one at home. i was able to get the phone password and when he left for work today I went through his whatsapp and saw their messages, he is cheating on me with a married woman who has kids too. They went to Germany together in June for a "very important business deal"... he also walked her home every day, and comes back late, he finishes work at 4pm and only arrives home at 8pm , and he blames it on the traffic jam, when I get sick too, he refuses to take me to the doctor, yet in their message, I see that he takes her everywhere, to a restaurant, to a hotel, to the doctor. It's been years since I last set foot in a hotel. The problem is that I can't leave him, I couldn't finish my studies, I was young and he told me that I won't need to work with him and it's true, but now i have to stay with him, he never let me work too because he thinks i will cheat on him. what to do?

Hello, if you were in my place, what would you do?
Post Opinion