Hi - I'm in similar situation. My dude is a "pretty-boy" who loves to dress up for work and gets plently of attention from women of all ages. And he looks all the time too - that just drives me nut. I've also questioned him time after time about whether he truly loves me for all that I am or is he still searching (we're engaged too). He thinks it's all in my head and I need to have more confidence in myself. That makes me think he takes no responsibility in producing this sense of insecurity I'm feeling and he's blaming it all on me. I'm sorry, I'm not much of a help here - but hope knowing that others share your agony will be of some comfort.