I have a ticket I bought for someone else that I'd now like to use for myself. Can I get it swapped to my Name / Account so it will show up in my Event list and not his?

Would I just need to "Return" it and immediately repurchase it? Could I lose it that way?

Thanks!

Unless it's conflicting with another event that person wants, just leave it. You can still use the ticket even though it was purchased under their account.