Just sad...

My husband is the love of my life. However I fear he does not truly feel the same. He never asks to have sex anymore, he often rejects me for “other reasons”(like pain), we hardly spend time together, and prefers to be away from me it seems. I’ve talked to him about it but his responses are always “its not my fault” from just because of his issues or to me “not going with”. Just today, we were spending time watching something together and he said he “wanted to take a break” and he’s been outside watching something else on his phone for awhile now. I know I’m probably just over thinking but I don’t understand why he wanted to stop watching our show to go out away from me and watch something else...