It does sound that he is putting some distance between you two and generally speaking that would be a problem but you’ve only known each other two months.

It seems unusual that you already spend 5 nights a week at his house. Do you have your own place? You pretty much live at his being there 5 nights out of 7. Perhaps after only two months together you could limit overnights a bit?

It’s much better to warm up to each other in a slower manner. Too much too soon might be causing him to resent you and perhaps withdraw/hence a pillow between you two.

It could also be that he simply isn’t feeling it. Cuddling implies certain
level of comfort and affection towards person. You can’t force it. He might not be feeling it yet. It could be way too early for him