I would like to have a baby but....?

I keep on having conflicting thoughts.. My partner and I love each other very very much, we have been together for a few years and would like a child together... yet something is preventing me from going ahead and i cant quite put my finger on what it is.. Once we were literally about to try and I pulled away just before we were going to do it. Since then, I have been really hurt as I was so sure I wanted it and couldnt understand my reaction myself !! But after a few months of thinking about it, I think it might be that I'm scared my partner and I wont get to spend quality time together like we do now, we dont go out much but just spending time snuggled up or having good conversations... and also I'm scared that a child wouldnt be able to entertain themselves and would need us to entertain them all the time... dont get me wrong, i love playing but i couldnt do it all day, i would be so depressed if i couldnt have quality time with my partner!! Could anyone tell me what it's really like, how a day goes for you with your kids and how you fit your relationship with your partner into it?? How do kids learn to entertain themselves??