kidscareme, perhaps my advice can be of use to you.
I have no children. I have never, ever wanted them. I actually quite like kids, and babies, and I love to play with them and I babysit often for friends. Like you, I enjoy their presence, but I equally enjoy giving them back to their parents and going back to my quiet, lovely home. As many mothers can't imagine life without children, I can't imagine life with them.
Oh, and I love browsing MN... I have been here for more than 2 years already. I find children fascinating, and I like to read about the experiences of people who have them. Precisely because their life is so different from mine. I obviously do not participate in parenting threads almost at all, because I have little to contribute with, but I do read them from time to time, and I participate in the Relationships one and the AIBU one.
I have also had societal pressure, especially from my dad, to have children. People have told me I would change my mind (I am 35 and hasn't happened), that I will meet the right man and I will want them (my DP is the man of my life, I am madly in love with him, but I still don't want children), that I am selfish (for me, having children without wanting them would be the most selfish thing to do!)...
Not having children gives me time to spend doing the thousand things I love doing. Among these things, I am mentoring a young man with autism, helping teenagers who have problems at school, volunteering in a zoo... Oh, and I am planning to go back to Uni to re-train: I want to become a midwife, and spend several months a year volunteering in the third world.
So as you can see, life without children does not equal a boring, purposeless existence. People who tell you children give your life purpose are usually the ones who always wanted children and never imagined themselves without them... that is great, and definitely the right choice for them. But not everyone is the same.
So who will take care of me when I am old? This seems to be the big question" for childless people. Well... I hope I will do. I have savings, a retirement pension plan, a partner who I hope will be there for me, and lots of friends I spend quality time with... I hope I will have a nice retirement home with all luxuries, and that I will share it with some of my friends and some new ones I will make there. I hope my nieces and nephews (my sister definitely wants kids) and my friends' kids will like me enough to pay a visit from time to time... and if they do, I will be sure it is just because they love me and like me, not because they feel they have to.
What will I talk about when I am old? Another question people ask me... God! I am just 35 and I have loads of things to talk about! I hope I will talk about my travels, the people I met, the adventures I lived, the people I helped... Definitely much more interesting than listening to the other resident who keeps moaning all the time about their own children and grandchildren, who never get to visit them ;)
All in all, the most important thing to be happy is not WHICH decisions you made, but the sheer fact that you were free to take those decisions. People who regret things are usually those who never had a choice, or who were coerced into doing something. When you think about something, and arrive to a decision all by yourself, you already know that that choice is going to mean you will miss on some things... there is no decision without risk. Yes, by not having children I will miss on maternity, on the all-encompassing unconditional love towards your children, the immense rewards which come with it. But by having children people miss on other equally important things. I am not a person who looks back and regrets the things I haven't had. I look forward and enjoy the things that I have. And at the moment, I am immensely happy, and the number of things I still want to do in my life are enough to fill 3 lifetimes.
Whatever you choose to do, I hope you all the luck in the World. With or without children, life is an incredible adventure!