Do you want to close it because you ARE indeed happy, right now?
Or because the seller has told you to before they help you?
If it is because the seller has said they can't help with a dispute open/ they will send you another item when you close the dispute, or any other reason
DON'T
If they seller is telling you these things they are lying and have no intention of helping you at all
You cannot reopen a dispute once you close it
So make sure you are happy right now, before even thinking of closing it because 'the seller said'