i might be a closet hoarder

so i keep thinking about this box of old clothes and toys from when i was little that i still havent thrown away. every time my parents or sister tell me to get rid of it, i just cant bring myself to do it. like the thought makes me feel so anxious and sad. but honestly its been in my closet for over a year now and starts to smell musty... is it bad i feel so attached to stuff that has no real use anymore? also this box is blocking half my closet space now, its getting kinda ridiculous. should i just suck it up and throw it away next time they ask or what?