If you feel like staying you say that what she did hurt and it's going to be long before she can gain your trust back. Don't make her feel like she can take advantage of you by saying things like you see her in the future. Some people use that against you. I'm not saying she's horrible. It's horrible what she did.

On the other hand if you don't feel like staying then say, I don't think we can do this anymore. Tell her exactly how you feel, but again, be strong. The key is that she realizes what she did wrong. She obviously understands it. If you feel that the slightest bit of how she feels is not sincere, then I would walk.

Finally, with regard to your post altogether, my advice would be you have plenty of women that won't even consider cheating and in fact, get sick just the thought of it. She's not the only one. If you're going to give her a 2nd chance, don't do it because you feel bad and that you see her in the future. You deserve better buddy. But whatever you decide, all the power to you.

Cdoc