Why do I feel this way?

Im 20 something casually dating 2 men in their late 40's. 1 man never talks about his kids yet their photos are all around his house. I found the good report cards from the good high school last week and was livid! The other man talks about his kids and everything else constantly. I enjoy our very long and interesting conversations. We often joke about how we talk so much that we cant remember everything that was said in the past! Suddenly I hate the secretive man and his kids. He hardly talks about anything at all! The other man has kids near my age who are a teacher and a nurse. I don't hate them! I also found out that the secretive mans kids mother has a good job. And he bought her an engagement ring worth 3,700. So why am I so angry when it seems that I like the more talkative man the most?