"We've talked about therapy but he doesn't seem terribly interested ... Doesn't want me to leave though."
Ahem -- emm, yeah, that sounds to me like, "I want you to stay with me while I ... continue to put zero effort into improving."
"Find out just what any people will submit to, and you have found out the exact amount of injustice and wrong which will be imposed upon them; and these will continue till they are resisted with either words or blows, or with both. The limits of tyrants are prescribed by the endurance of those whom they oppress."
-- Frederick Douglass, http://en.wikiquote.org/wiki/Frederi...ion_.281857.29
Sorry we all seem to be dogpiling your fiancÚ with disrespect, and maybe he can change and improve, if he has sufficient motivation. Right now he still seems to be more worried about how other women feel than about how you feel. Just call him on that shit and make it known in no uncertain terms that you deserve better ... because you do.