Trying to set those goals!

[Dom R]

A 180 for me would be to cut him off in all ways.

Am I nuts?

you're not nuts. but you are misusing the "180". the way a lot of people do around here.
"cutting him off completely" is really "LRT".
180s, are supposed to be different, yet POSITIVE, changes within yourself.

recognize the difference.

You havent really done too much in the way of 180s. except the witholding physical stuff. which is GOOD! but isnt enough to get him to notice you.
withholding physical affection gets him thinking about past fun with you. it doesnt get him thinking about future fun with you.

The "you'll always be there for him"... you might think of disabusing him of that notion ASAP. Next time it comes up, tell him that if he starts dating someone else, he'll be seeing a whole lot less of YOU. and if he divorces you, he will be seeing NOTHING of you, and just forget about asking you for help with anything.
Show him how tough you are. after all.. he asked for it
I think he's been sounding you out. And you're still sounding like a creampuff to him, because you didnt stand up for yourself in that area.

I think that he's still interested in you, but at the same time, testing out pulling away. When you dont stand up for yourself, I think he takes that as validation for him pulling away becuase you're "not strong", and not showing him boundaries.

to restate a bit: I dont think the whole "open the cage door and let him go" applies to encouraging him to go. Obviously, you cant STOP him. it's his choice. But dont say, or even imply by NOT saying otherwise.. that you will "always be there for him".
That validates what he is doing.