Newbie seeking some experienced advice

[nick77]

My W and I had been arguing regularly for the last 2 weeks. Finally Sunday I told her I'm not going to do it anymore. I'm done fighting. I'm going to accept that we are parting ways and I told her I forgive her for whatever she did to me (she slept with someone a month after separation and has been seeing him regularly since), hoped she'd forgive me someday for anything I've done, and that I would only contact her regarding our son.

That evening when I took our son to her house she talked and joked with me and we laughed together for about 20 minutes. Tuesday we both attended my son's baseball practice and the 2 of us passed ball for about 45 minutes and talked, joked around and laughed. At Wednesdays practice we were watching when I noticed she would stand close to me then move away. I would inch away and she would move closer. Then I noticed she was watching a couple with a newborn near us and it looked like she got teary-eyed. She had sunglasses on so couldn't tell for sure. I could also tell she wanted to say something but I wasn't going to dig.

Finally she said "So G (our son) said to me that since you and daddy were having so much fun passing ball that's a good sign you're going to get back together". I told her I don't know what to say that and she said she didn't know how to reply to him. I asked her what she thought about what he said and she told me she doesn't know. She doesn't want him to be confused since we both don't know what's going to happen. This is coming off of a good 2-3 weeks solid of pretty heated arguments and her saying she's filing for divorce numerous times. I told her I'll always think of getting back together,which I know is a mistake, and then asked her what she felt about what he said. Again she responded that she doesn't know but got real quiet and didn't say anything for a few minutes. We talked and joked around a little longer then she had to leave and I walked her to her car.

I'm sure I did a lot of things wrong during that interaction but inside I was crying tears of joy to hear what she said about not knowing what's going to happen. Should I feel hopeful? Was that really a positive thing or am I just being blinded by my desire to repair my marriage? Should I stop talking and joking with her and trying to be friendly? I don't call, text, or email her at all unless it concerns our child and won't but I don't know what to do next.