Dont' see him. Seriously. Someone who breaks your heart like that and then comes back saying only, I want to hang out, is not to be trusted. He's probably lonely and looking for an easy emotional grab.
If you can't stop yourself, then you should ask a lot of questions up front. I know you feel like this is a slim chance for something and if you push too much it might scare him off, but let's be clear - he has to earn your trust and attention again after what he did. YOu have power here too. He wants to see you now, and so you can choose.
Over the phone make him give you some good reasons for seeing him again. What does he want? What are his intentions? Does acknowledge what he's done, or want to gloss over it? Does he say, I don't want to talk about that stuff, I just miss you and want ot hang out. Make him work for it sister.
Cause you know that even if you hang out and have a good time, unless he is serious about pulling things together again, at the end of your outing you are going to feel almost worse. YOu've going to be vulnerable again, and wondering what's goign on, and if he calls or doesn't call, or texts but doesn't call...you'll be wondering what it means...oh the agony.
Right now it's clear: he broke your heart cause he's a cheating jerk. If you see him again then it will be fuzzy again. And as much as your'e hurting now, fuzzy hurts worse. So think VERY carefully.
Also, here is a website that you can find other folks going through exactly what you are right now: www.soyouvebeendumped.com