You will help him by repainting the bed room (him to begin to sort thru her things with him) and changing furniture around and encouraging. (Better if their in-laws contributed to this, it really is area of the grieving procedure)
Shanhun, i could know how you’re feeling relating to this relationship and just why you will be wondering whether it’s a lasting future.
But I do not think you might be, after all, wasting your own time using this guy, since you like being with him, you state you like him, and you will also imagine investing the others of one’s life with him.