I think it’s healthy to get rid of them and important for you to do it in an ethical way.

Wrap them up and mail them to him, no return address, no note. That way he won’t think you went to his place hoping to see him or something dumb like catching a whiff of his cologne.

Shake off the dust and get on with life.

No, wait for him to ask for them if he wants them. Put them aside somewhere where you won't see them or interact with them. If he doesn't come for them in a month or two, throw them out.

That's up to you. Just remember to buy some fish three days beforehand, and wrap the fish in his sweater and shirt and leave it outside in the hot sun before you return them.🐟️🤣

Just drop them off regardless of who is there. If no one is home leave it by the front door.

Just make a nice fire and burn it. Or sell it, or wear it(not healthy, since you will linger on the past), or donate it.
Or make art with it. or use is as a cleaning cloth, something of your own sensation.
I you feel to return it, return it. I send him a info that he has to come pick it up or leave it at his door/flat.

Nope

No, if he wants them he'll have to arrange something with you that you're happy with. Otherwise, take them to a charity shop.

nah, if he wants them he can ask for them. Put them somewhere dusty for now 😆

just donate them to a thrift shop or something

Tell him he can find them at the Goodwill store.

actually it's yours since he left it at your place.

No. Give it to Goodwill

Nope. Toss it