given you are "storing" stuff for them, you can't completely cut them out - well, not until you resolve that. is it perhaps time to put on a brave face, message them asking when they are going to collect the items as you need the room (or, if you feel you can, maybe even say you don't feel that your relationship is the same as at the time you initially stored it and you feel uncomfortable having it there/being used or whatever) - it's not going to be easy no matter how you broach it. but the fact that you are feeling anxious at the thought means you probably need to deal with it sooner rather than later. the longer you put this off, the worse you are going to feel in the lead up, and the worse (emotionally, for you) the actual confrontation/meeting will be. it took a lot for me to "suck it up" and confront some of the people in my life that were hurting me, and it took a lot of support from others for me to get brave like that, but the relief of having it over with has helped heaps!