In a recent thread discussing dating an older man, I said, "In order for a relationship to work, the people in it must be compatible. One of the most important ways that require compatibility is emotionally. If a forty year old man and a twenty year old woman are emotionally compatible - then she is growing as a person and maturing twice as fast as he is. At that rate, she'll outgrow him very quickly."

All other factors aside, I am not surprised you are growing out of your relationship.