Don't sweat it...

Having a relationship with anyone is hard, but it would be extremely hard to keep within a relationship that your pretending to be in for the sake of other people, or to keep up appearances. Today, people want to know who your dating, when your going to get married, and then when your going to have children. This is a natural thing for people to do, especially family members/friends who are the closest to you. They see you don't fit into their cookie cutter form, so they will put on the pressure to make you conform to it. I wouldn't sweat it too much though, be you and don't let other people push you around. If they ask you why your not dating, tell them you haven't found the right person yet, if they really get nosey, don't be afraid to them to mind their own business.