Dear Amy: My boyfriend and I have been on/off for the last five years. During the time we were apart, he had another girlfriend. I didn’t know about her. He and I maintained a “friends with benefits” relationship during our breaks. After I became pregnant with his child, I found out that they were very serious. I learned that she was pregnant, too. Our sons were born nine days apart. They are no longer together, and he and I are trying to work things out, but I can’t seem to let their relationship go.