Please accept that this might be likely to be a time that is long their to be able to actually commit. You’re his “today” girl, but he’s got all the last to sort out.
You might help him by repainting the bed room (with him) and changing furniture around and motivating him to start to sort thru her things. (Better if their in-laws contributed to this, it is area of the process that is grieving
Shanhun, i could know how you are feeling concerning this relationship and exactly why you will be wondering whether this has a long-lasting future.
But I do not think you might be, after all, wasting your time and effort using this guy, with him, you say you love him, and you can even imagine spending the rest of your life with him because you like being.