Married to ADHD wife - almost divorced but uncertain times

I am glad I found this site - the last few days have been an awakening to what ADHD relationships are like and it feels like I am not so alone and many others are living the same experience. 

This is my second marriage - the first ending in an affair and betrayal after 10 years of being together. I went from a narcissist to one with ADHD, great choices.

We have been together for 7 years now - but it was a few years in before she even told me she had ADHD. I did not think much of it as I did not know at all the impacts on relationships that it could have later. My wife was recovering from cancer when I first met her, and that consumed the majority of any serious discussion for the first bit. After that she was very focused on having kids. We are almost 40 so the time to have children of our own is running out. The problems began here as her becoming pregnant and having our own child is very high cancer risk. At first we had discussed and began planning for adopting or fostering, but then this changed to having a friend who was willing to be a surrogate. Fast forward through COVID times and now we found that friend is unable to due to health conditions, and having another surrogate would run into a 6 figure cost. I had concerns about this but for the sake of having a family was willing to figure it out, before we both miss the boat on being able to. We had a few discussions but as the case tends to be as I am discovering now it is really difficult to have big conversations with someone with ADHD without getting heated, and I do not handle this well as I tend to shut down and avoid conflict. 

At this point in time after the beginning appointments for surrogacy it was as if a switch had been turned off. She went from being a loving wife to immediately talking about divorce and any sign of love just disappeared, and I felt completely cut out of her life. Suddenly it was a huge fight and constant criticism of everything wrong with me for months. At this point she also apparently started taking Adderall. I have no idea what prompted her to start treatment for ADHD on her own there as it was not something we had really talked about ever.

It was at this point that things just became... confusing for me. First off - with my first marriage even though it was heartbreaking, when it was over, she moved out and the recovery began in short order. Now - my current wife still lives in the same house but in a different bedroom with no talk of moving out any time soon. Some days it feels like she still wants to be married, some days it does not. She still cooks breakfast for both of us, still buys me clothes. She still wants me to get up with her every morning to make her coffee. She still wants to go for walks together. We still hug, snuggle a bit, watch tv together.  At the same time, anything public or resembling a date is off the table. No "I love you". No kissing. No sex. She also locks her bedroom door as if she doesn't trust me for some reason even though I have never been remotely physically or verbally violent for that matter. That does raise red flags for me though having already been betrayed in a prior marriage. She is adamant that she never would cheat although my level of trust on the whole situation is pretty broken these days. It has been a month or two since we have had a fight. When things came to a head several months ago during one of our worst fights I agreed to divorce after hours of heated discussion, but I was not going to initiate it. At least not yet but I feel like I might have to be the one to do it at some point if we remain in this weird state uncertainty for too long. 

Our 5 year anniversary is actually in 2 days and I don't even know what to do about that. Lately I have been living as separate of a life as I can, to focus on myself to have some happiness and not be so lonely. Do I just not even bring it up and wait for her? Go out and do something on my own that day? Try to have a conversation that might just end up in a fight and sad loneliness yet again? Give her a card? 

I guess my question is at what point do you know a marriage is over with a wife with ADHD? Is it already past that point and she just is stringing me along or have some sort of inability to make decisions on leaving?