Hi kdvor, I'm sorry to read your story - but glad you have found the forum as there are many wise people here who have trodden this path before.
In terms of interacting with your H, I would generally apply the 75% rule. If he is being enthusiastic about things, aim to respond positively (not coldly) and offer around 75 percent of that positivity back at him.
So, if he hugs you, offer him a hug back, but disengage after a brief cuddle and pleasantly get on with what you are doing. If he texts ILY, maybe just say thank you back.
It takes a while to get into the groove, but try and work on the basis of showing rather than telling. Don't tell him you are moving on, but show him you are moving forward.
Keep on reading and posting...there is lots to learn, but it sounds as though you are doing pretty well for seven weeks in...
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus