Clothes from teenage years

So I am in my twenties and still have clothes from my teenage (from 13y.o. up) years, clothes that my family bought me but I don’t like, hand me downs from my mum and grandmas etc, all of which fit me but I feel terrible in. I don’t want to throw them away for obvious reasons and I know giving them away to charity’s shops and others only puts my responsibility onto others. I tried seling the on Vinted for few euro each but they didn’t sold and it was a lot of time. I know that one should care for their clothing for as long as possible, but what if one feels like they are overwhelming them.