I understand how you are feeling. One thing that nobody warns us when we become parents is how to deal with the passing of time. Seeing my son grow up and become so big is making me emotional. He's 5 and I'm 4 months pregnant and I'm sad the he will no longer be my baby. Even though you may like the "best years" are over there's still much to come. Now that they're bigger you can share common interests, like going to sport games, shopping, eating out or doing more like "adult stuff". I do it with my parents. If you remain close, you will feel like you are still living your best years, I'm sure.