Hmm, I don't see a password reminder feature either. You'd probably be best off either explaining your problem in this thread, or contacting SuitCase by private message. SuitCase may be able to reset your Candybooru password.
I had the same problem, and no, there isn't a reminder feature. I just ended up making a new account.
But, when I asked Tae about it, she said it'd be no problem to contact Suitcase. So that'd be your best choice!