To answer the question, no, I don't think a deal is already in place. I'd put the odds of Love ever donning Celtic green at about 5%. Almost all of that 5% is because of possible trade. If love hits free agency, I think there is close to zero chance he picks the celtics.
I'm afraid too many folks are clinging to loves summer vacation in Boston. I don't think that was a ploy to get him to boston as much as it was a ploy to get minns attention. So in essence, I think love was just using the celts.