A little bit older, a little bit wiser

Well, yesterday was my birthday. I'm a whopping 36 now! LOL Four more years to 40. *sigh* But hey, they say life begins at 40, right? Anyway, it turned out to be an "interesting" birthday. As I've said, I'm a single mom of a 15-year-old son. I haven't seen his father since I was four months pregnant. Well, yesterday I get a phone call from my son's stepmother--his father's wife!! I was shocked, to say the least. But, she was very nice and we talked for a long time. It seems my ex has changed a great deal. (In other words, he finally grew up. We were just kids, really, when I got pregnant.) Anyway, he regrets not being there all this time and wants to develop a relationship with my son. So, my son called him last night and they talked for a while. And we're all going to meet up on Sunday and he's going to see his father for the first time. I feel in my heart that this is the right thing to do, I guess everyone deserves a second chance. I'm just so nervous about it. I don't know what it's going to be like for me to see my ex again. I mean, it's been a loooonnnggg time. Anyone have any advice??