I think his refusal to have sex with you is really horrible of him.
It's the first thing you've said that makes me doubt whether he loves you as anything other than somebody to look after him.
Or maybe he's enjoying the power it gives him to reject you sexually at a time like this.
Whatever it is, it's not good.
Why are you impressed with his "sexual boundaries"?
The problem you have is that he didn't maintain the appropriate boundaries WITH OTHER WOMEN but erected boundaries between you.
And it appears he's still keeping you at arms length, even now.
To have hurt you in this way and still be saying he won't have sex with you until x,y,z has been completed is absolutely outrageous behaviour on his part.
If you feel that having sex again would help you feel better (even temporarily) and help you to bond with him, then if he loves you and wants to rebuild your relationship, WHY IS HE SAYING NO?
It's not appropriate sexual boundaries, that's for bloody sure.