I still happen to have the lovebite virus even though the epidemic is over. Anyone know a way I can get back to my original form?

You use a

Yes buy a Lamouracillin from user shops.

You can also still turn in candy hearts to Louis I think. The link still works, but I don't have any hearts in my inventory, so I can't confirm.

Thanks for your help Lypsyl and chibi_paws! :)