"always tells me i can look better if i worked out" - going by the idea that a healthy person is attractive (a reproduction thing; survival) I'd say anyone call look better if they worked out. That said, to just tell you that doesn't really add up to me... seems a tad unnecessary and rude. I'm also into fitness, but I've also been very out of shape. I'm a bit more casual about it... if a woman told me I'm kinda letting myself slide a bit, I'd be fine with it.. it's just nature so I try not to take it so seriously. Your ex though? No... none of his business... and frankly, I get the feeling he's a bit of a game-playing poser. I'm cynical though, so who knows.

Making fake Facebook accounts to cyber-stalk your ex is not on though, although I do understand where you're coming from. I was stalked by an ex before and it was not pleasant. Made getting over her very difficult and was generally just stressful.