After four years,
I suspect the reason he broke up with you after 4 years was because he was already seeing someone else. All the reasons he gave you sound like excuses he made up, otherwise why would all these things all of a sudden come up after 4 years? Men very rarely leave a long time marriage or relationship unless they have someone else waiting in the wings. Sorry if this hurts to hear, but that's my honest opinion. As far as him wanting a FWB relationship, you have every right to be hurt and insulted by his suggestion of this.
I definitely think it would be too hurtful to you to have a FWB relationship w/ this guy.
Well - I actually do think he found someone else and he wants FWB's - don't ever do that.
But are you
How would you feel if someone who said they loved you didn't trust you?