Having a child doesn't mean your life is over. It's where your new life begins. Sure you can't party every night. Instead you'll be watching a part of you grow up. You'll cuddle, feed, comfort, love, change, and so much more. To me that is more exciting.
I've seen to many say that having a child ended their life. No it didn't. It started a new one. One that is a gift that keeps giving. Don't take that for granted.