My heart goes out to you as you struggle so much with your little friend's passing. As a cat gal myself, I can relate to how truly heartbreaking the loss can be. I can recall when my most beloved cat passed some years back. As a grown woman I sobbed on and off for days, really sobbed almost uncontrollably at times. The grief can be enormous and the triggers can appear to be endless, all depending on what they meant to us and the connection we had with them.
You'll feel what your biggest triggers are. When you think of putting his things away, you'll know you need help because of how incredibly triggering this image feels. As Beee suggests, look for help. If you feel you can't be involved at all, that's fine. Have someone else do it for you. If your little friend used to predictably come around the same corner of the house at the same time of day, that corner at that time of day will be another trigger. I imagine you'll feel it. As you already know, there'll be a lot of triggers you'll feel. I know it's hard to imagine at this point, where everything feels so new and raw, but intense emotions that come with the triggers will gradually lessen over time. Don't let anyone insist you speed up the process, trust the process will naturally happen for you over time, the lessening.
I can relate to missep123's take on life. All that psychic stuff is my cup of tea. This may sound seriously weird but if you can imagine he's still there with you in some form, can you imagine him saying to you (if he had a voice) 'I know you miss me to the point where it's heartbreaking but we've got this. We'll get through my passing together'. I imagine I just made you cry. I've got tears welling up in my own eyes. If you imagine he's there in a different form it might make things a little easier. It's like you can't feel him (his fur) but you can sense him. Not sure if that will help. I hope so. If it makes things worse, work on distracting yourself from imagining him being there at every turn. Different things work for different people.
Give yourself the freedom to feel how you feel. Give yourself that gift. If anyone insists you're being 'ridiculous' or 'over dramatic' (the kind of things people said to me when my cat passed), shut those people down with 'You're obviously not sensitive enough to feel how I feel. I suggest you work on that!'.
Feel free to return at any time and vent any upset you feel during your healing process.