Opportunity cost

When I decided to get  job, it meant that I had to give up some of my free time and time that I spent with my friends in order to work. I have a lot of fun working in kids world but kids are exhausting and I would come home completely dead because of running around and playing with them and I had school on top of my job. As a result, I was earning money and able to get a car, but I was lacking as a friend and sister/daughter because I was either working and unable to hang out or, too exhausted to do anything. 

The future event that I can think of is having a baby. When I decide to have kids, I will love them I'm sure and it will be fun but, from what I have heard, one must give up their own life in order to raise their child. So when having a child, the result is the joy of parenting with the loss of a social life because your life revolves around the child.