When I read your message, the question that came to
mind is: "Why did he tell her in the first place?"
I mean if I had been cheating on my husband, and assuming
I love my boyfriend, and assuming it was a "quickie"
that meant nothing to me, why would I come out and ruin
(or at least threaten) an otherwise happy and healthy
relationship? Of course I would feel bad, and
I would probably be extra nice with him to sort of "make
up" for it but I wouldn't want to jeopardize something
good.
The boyfriend's reaction sounds weird to me.
Did he do that to come out clean? It sounds to
me like he wanted you to bear the burden. If such
is the case, then it's not a good sign. Or is
there something deeper that triggered this affair with
the girl at work, a sign the relationship is not that
stable and he's trying to tell you something?
Then again he's being weak and not able to come right
out and say what's bothering him. Or maybe he
just wants out and taking the step so you make the move?
Either way, it's not good. You should have a
straight conversation with the man. Set up an
evening to talk, away from other distractions.
Take time to calm yourself down first, so you don't
come up with too much emotion, and get those answers
out of him.
If really it was a one-time affair, and he still loves
you, he wouldn't have told you (unless there are some
details you left out or some friend of his threathened
to tell); if he came up to you from his own free will
and told you, there's something weird going on.
After you have this talk with him, take some time alone
and sort out your feeling. But I say, with the
information you gave us, you should take the first exit.
Cool Cat