My boyfriend left me a month ago because he no longer finds me sexually attractive.
It is obviously very hard to hear and as a result my self-esteem has diminished a lot and I feel repellant (hurray!).

When we last met, I asked him if he could explain how it so suddenly happened (but maybe it's only the revelation of it that was sudden... I never noticed anything particularly wrong while we were together).

And then he said 'There's something about food with you, you are generous, kind, you like to give ... and I like to eat... (then he stopped speaking and said..) OK I have a problem with my mother...'

I suspected something of the sort, but hearing it was devastating...

However, he refused to even consider that the link he established between me and his mother may be related to his loss of sexual attraction for me.

He said he 'adores me' and I'm the best thing that has happened to him in 2 years... But wants us to be friends from now on. He ruled out any sexual relationship between us.
He even reproached me the fact that while we were together he felt that when he hugged me I expected intercourse to follow (wrong!)... In short, he did not understand that I could have desire for him (he was my boyfriend, of course I felt strong desire for him, but was far from being all over him at all times!).

I'm at a loss and need to understand.

If anyone can give me a clue, I'd appreciate.
Thank you.