justaboutus, how has he responded to you so far, for the last 7 years? Why do you think THIS time he will respond more positively?
You've said yourself that he snows everyone, a master manipulator. So what's to prevent him from 'doing' your bidding i.e. going for an interview, then going back on it again?? And if he were to get full time employment, would everything be ok then? All forgiven? You'd be happy?
From your posts it sounds like you 'want' a lot of stuff from him and for 7 years he has resisted giving you any of it. Doesn't that prove to you that you cannot change anyone? My al anon meeting yesterday was about expectations. When we set them for others and don't get what we want, it turns to resentment because you are disappointed when they don't or can't meet them. Let me ask, what you want for YOU instead of him?