Our expert says:
Since you have lived together have you had sex regularly? Sometimes becoming too domesticated or familiar in your arrangements can kill the erotic spark for certain people. They like the company, but their sexual excitement wanes. Of course, you will never know what the real issue is until you can have a reasonable conversation about it.
Only you know the best way to get him to discuss things with you (if he ever has?). Perhaps rather ask about his sexual fantasies, what about sex excites him, what would be his perfect sexual evening with you? This may seem less confrontational that questioning his sexual interest in you. Do this when you are both feeling relaxed.
He is also 55. Does he ever masturbate? Can he still sustain an erection? Does he have any chronic health issues? Is he depressed or burnt out? Many things can adversely affect the libido. Including interest in another person. I don't want you to leap to that conclusion straight away though. Just be aware of it.
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