My partner and I have been together 7 years, both are 50 years old. Our physical relationship has been non existant for the last 4 years due to his ill health and him basically not being in the mood. I think the main reason is hes just not attracted to me and have tried several times to talk about it to which he says he loves me and there is no one else, that life has been stressful these last few years. Yesterday i saw he liked a girls photo on FB, she is 28 and wearing a bikini. I think this is totally disrespectful towards me and makes me feel like crap. I havent mentioned this to him as i know it'll end in a argument. Am i overthinking that its disrespectful towards me. He obviously likes her photo but cant muster the energy to give me the physical relationship i need. How do i bring up the subject of this photo and make him see my point, or do i even have a point.