My 14-yr old son's father has been out of our lives even before my son was born. Now he's reappeared...

He's found me thru Friendster and emailed - asking for forgiveness and a second chance. All these years he's managed to stay away, and my son and I have moved on perfectly well without him. I'm now in a relationship and my bf and I love each other and are happy together. My son has a good friendly relationship with my bf. First off, I thought, why now? what for? Honestly, I don't know what to make of it. Your inputs would be much appreciated.