Since the OP is adamant about this not being a hoax, I’ll back off and take it for what it really is.
That said, is it possible that the rejection was due in part because you did not feel as 100% as you once did, and as a result projected a negative vibe? That might account for the “rejection” you were picking up, as it was a mirror image.
At any rate, and regardless of the weight, if your mood is positive and upbeat, it comes back to you. Break the routine, make dinner reservations, get dressed like you mean it (makeup and everything) and see if that does not work.
As do most of us middle agers, I know dozens of folks that are 30-40 lbs heavier than the day they walked down the aisle. But that has not stopped them from having a very well rounded marraige. I’ll not elaborate further, but you get the idea.
Before you opt for the therapy / counselor venue, try the method that has worked for most couples. The food and visual senses route!