In my experience having a baby can be a watershed moment in our lives, some friendships do drop away, other new ones can form often with other parents. Parenthood is pretty all consuming and does change your life.

That said if you feel it's right you can always try picking up with her again in the future, some friends we can dip in and out with over the years but pick up where we left off - only you can know if this is such a friendship.