I've seen this a couple of times recently. (On this board, I think.)

``Loathe'' is a verb: ``I loathe to go to the dentist.''

``Loath'' is an adjective: ``I am loath to go to the dentist.''

They're pronounced differently, too. (Not that I can tell whether you're mispronouncing it or not; I say this to be complete.) The `th' sound in ``loathe'' is like that at the beginning of ``this''. The `th' sound at the end of ``loath'' is like that at the beginning of ``thin''.