I am sorry to hear that OP.
However, I have heard a few people say who I know/have known, that they have never been IN love. One lady I know told me some time back, that even at the age of 50-something, and after 30 years of marriage, (35 together,) she can honestly say she has never been in love. She cares for her husband, and has feelings for him, but has never been truly in love with him. And she says it makes her sad that she has never been in love, but that's just the way it is.
She said she dated him at 18-19 because her best friend was dating his mate, then they drifted into a relationship, started living together, then got married, and had kids. Because it was expected of her, and it was the done thing. She said, back in her day, women didn't want to be left on the shelf, so most women would settle for a man that would do. As long as he had his own teeth and hair, and a job, he would do.
But she says he is a nice man, a good dad, and a good provider, and they get on well most of the time.
But she has never been in love with him. After 35 years together.
Almost as sad as not being loved by a man, to have been with a man for 35 years that you are not in love with.
Especially when - as she stated - he is in love with her.
And no, he doesn't know that she is not in love with him.