Relationships change.... but is it reasonable that you do not receive any passion/intimacy from your partner from here on in? You are 42 yrs old. You probably will live to be at least 80..that's a long time.
That fact that she does not want to work on this is somewhat concerning. People do go through times when they are not "feelin it".. and should not be pressured..
Everyone's level of passion is different and should be respected.. but but but. My x and I did not stayed married for many reasons. I'm not going to go into any blame game..but the hardest thing for me is that I am a very passionate person and he lost the loving feelin

I know I needed to work on issues on my end...but I was willing!
Anyway, that's my take on things.
Good luck.. I hope you two can find your way back to the intimacy.