OK. My take on this is quite personal, but I, too am a Cancer with Sag/Cap cusp hubby for 30 years now.
It is an opposition honey. Yes, a complete dichotomy of a relationship. He wants you, he wants to be free, he wants you, he wants to be free...Are you quite sure he is FREE? Is there someone else in the picture taking up his "spare" time already?
You should read up on BOTH signs and check the rest of the cahrt for clues...my hubby has 5 planets in Sag, but he has always thought he is a Capricorn! Because he is on the cusp - the 22nd of Dec.-yet in 1946 that was Sag! His only placement in Cap is Mars so maybe he identifies so strongly with that ...I dunno.
Anyway we Cancers love home, hearth, lots of touchy-feely and coochy coo, right? But you cannot smother this man, or overwhelm him with your emotions, he will run...and fast.
In my experience it takes MUCH independence on your part-have outside interests and be prepared to do mundane tasks by yourselk...like, shopping, home cleaning, leisure time and more. Get interested in a hobby so you have something to do when he is "busy" doing his own thing. Oh, he may not be a bar hound, or go out a lot with the boys, but he will definitely be "in his own world" around the house, doing "his thing" and probably won't want interference, and any time he is interuptewd or criticized, it is interference. believe me.
It has been a good relationship mostly, don't get me wrong, but my "clingy-side" is definittely lonely.