I am so glad you sought out your friends. I am glad you have comfort and company, both are good things.
As for the inlaws, I know it seems cold, but they have to side with their child. I know they could be courteous, at a minimum, but perhaps they just havent't that grace.
I often wonder why my MIL has not called me or even written me a little note. We were so close. I had a blowup with FIL almost two years ago and the man is a serious grudge-holder, but her not contacting me hurts.
I just look at my own mom, though, who wants very much to call my H to tell him she cares about him, and I still will not let her. So who knows what H thinks about his MIL (probably thinks of it very little, with the current self-absorption) but from outward appearances, it could seem that she does not care about him. That is totally untrue.
Just saying you cannot know for sure and you have enough to handle right now, so try to put the IL's out of your mind.