Hiya, I am so sorry to hear you’re going through this. I unfortunately don’t have much advice currently as I am going through similar situation myself back in November I found out my partner of 14 years had been having a year long affair. I was/am devastated and heartbroken he was my best friend too and to lose all that has been hard and having to see him weekly when he visits our 2 children doesn’t help. The only thing I can say is just take it 1 day at a time that’s what I’ve been doing. My children have been the ones to give me strength through this as I know they need me especially more than ever right now. One of the thing I’ve struggled with is having someone to talk to as I just don’t feel my family and friends understand because they haven’t been in the same position as me and my ex was the one I could truly open up to and now I’ve lost that so at times I feel alone going through this. I am here if you ever would like to talk. Sending you all the best.