Can't throw things away

i was cleaning my cupboard today, planned to throw away all the un-used ones so that my cupboard wont be soooooooooo cluttered up anymore...or at least, not cluttered up with my stuff. I was damned sure that most of the stuff are dev's, her stuff that she buy then dun like then dun use anymore and she left here and can just heck care about them....i shared cupboard with her btw, and planned to separate hers & mine because wotever that's hers she left here cant be worn anymore which was why they're left there in the 1st place........
I thought i got very little clothes, which was why i always use dev's, but now that i cant use hers, i planned to buy more shirts......
ended up, i found out that she has thrown wotever hers that she didnt wear liao, all that's left of hers only take up small fraction of the whole space....It's ME, my clothes, too many!!!!! to think i still plan to buy somemore......buuuut, most are un-usable lar......most are:

1. free t-shirts from pri, sec, jc
2. class t-shirts made of very sucky material so i dun wear them
3. old home clothes that i used to wear so often and wash so often till they got so thin and on the verge of tearing and since i love them so much i stopped wearing to prevent them from tearing....till now.......wot happen? all now got yellowish spots........
4. old uniforms, but that's very little, so dun matter
5. shirts i used to wear when i was younger, a bit small, but still can wear, but since not so comfortable so they are practically nv been worn

All these, some turn yellowish, some got yellow spots, some got these mouldy smell......yikes....

but still, i cant throw them away, just cant, dunno why lar........like i cant bear to throw.......but keep for wot siah............just dump them ah, or wot/ give my ma and use them as mopping cloth ah, cannooooooooooooooooooooot lar.......hiiiiieeeehh....