I've been in love with my rabbit hubby for 32 yrs and my feelings are still the same

Our relationship has always been up and down, but lately I've noticed he's too quiet and distant and sad.. We have 5 beautiful adult children ranging 29 to 18yrs old and they have all happily left home . I am feeling like I think he wants his freedom. Twice while we argued he said he wanted a divorce but then later on that day he is friendly and happy and everything is OK with him. I love him so much and I am getting old and unattractive, and he is always surfing the Internet looking at porn..pretty women muscley men and cars. Do you think this would be healthy if I was to help him along with the idea of getting a divorce? Of course I don't want another man in my life bit I do want to give him his freedom. The ugly thing is, is that I'll be the one who aches and cries and be unhappy. But I know I gave to let go.. any advice appreciated