Some ideas: if possible, try to lighten up and distract yourself somehow, helpfully, so this isn't on your mind constantly. Plus if she doesn't feel you are "clinging" in anyway, it could be helpful! Sorry for your pain, tho. Been there, actually still there in some ways at a much older age, in a long-term marriage. Also, she may be distracted by other issues, and they may have nothing to do with you, but you also may or may not be able to find out what they are. There are a number of possibilities, and I know it's hard, and I wish you well!