Marriage & Children (Never)

My partner and I have agreed that we will never get married and never have children.
We both feel, and this is only our opinion of ourselves, no one else, that if we get married, fall into gender roles and work/home patterns, and have children, we will restrict our lives.
We also want to maintain the romance, love and excitement in our relationship. 
We have been together for over 2 years now (I am 20 and he is 29). We both agree we don't want to move in with each other, and have agreed that independence is really important.
What are your thoughts?