[DarkForceRising]

I'm not entirely clear on your situation here.

Are you planning on getting back together in a serious capacity? Who initiated the split in the first place?

If you dumped her, I would be coy about specifics wrt to having met other girls. Don't flat out deny it, as you don't wanna look like a puss.

If she dumped you, I'd play it slightly less coy, yet coy just the same. This way she'll suspect that you have hooked up with other hot chicks. She'll feel the need to compete for your affection.

Actually, as a general rule, I think I'd play it coy in almost every instance. She needs to respect that your world didn't end with her.