Quick note to SuckerForJace (cause I can't PM you)
The problem you noticed was an editorial error, and I have gone back and fixed it. I appreciate you telling me, otherwise I wouldn't have noticed that there was a contintutity error. To clear things up, originally Jace broke up with Clary because she loved him and he was afraid of love. Then I thought, but that's a bit cliche, so I changed the story so that Clary left him because she thought he was unfaithful.
The reason why Jace didn't tell Clary is because he didn't know that she thought he was cheating on her. He can't tell her that he wasn't if he doesn't know what she thought.
I hope that helped
MortalEnemies 1234, Vikki ;)~