re the cable/internet bill...
I would ask your L. but I would think that since you are both still owners of the home and he decided to choose another residence he's still responsible for the bill. You guys didn't have a convo and say one of us is going to move out one of will stay which do you want to do etc. he's obviously making decisions that are best for him and so should you.

are you under any sort of contract agreements with any companies? If so then he deffo needs to pay his portion. H and I do that still even though we mutually decided (or rather I pushed) that he should move out.

it is hard!!!! And don't worry too much about what it means that's hard. you'll drive yourself crazy. Everyone told me I would "really feel it" once he moved out. And that upset me. But it's true. It's a lot to deal with. Aside from the R, it's all the new responsibility of looking after the place on your own, etc.