no, No, NO!
Not again!
...well, it won't happen again, I promise.
I won't let you down again.
Even if I need to say No right before the start.
I love you, but I don't wanna hurt you again. Not in the same way. Not... again.
And, I don't want to be a jerk, but... I saw it coming all along. Didn't tell anything just to keep you happy. At least for a while.