I completely understand your concern - totally!! (Although I seriously doubt he would just up and D you because you are now suddenly unavailable - I doubt this is his motive for waiting this long)
What about just planting the seed - nothing definite just clues that point in that direction? Use the GOOD = BAD, BAD = GOOD theory on HIM.
Next time he comes over, act as if you are so excited to leave you are practically bursting out the door. Dress up really sexy, (I'm thinking a cute plaid school-girl skirt, fishnet stockings and cute boots paired w/ a snug fitting top) put on some different perfume, leave some victoria's secret bags folded up discreetly yet where you know they'll be spotted.
Come home gushing with happiness, daydreaminess and sexy confidence. Barely look at him, as if your happiness is truly your own without him. I bet it will make him wonder.
That should make him wonder, without saying or doing anything.
