I don’t recommend dating unless you are ready for marriage.
That said, I also don’t think that it’s a good idea to choose one vocation (religious order, or single life) out of fear of the challenges that come with another. If God is calling you to single life, then that is something that you should desire in and of itself and not because it’s get you out of changing dirty diapers!
Remember that satan uses fear as a tool to sabatage you from doing God’s will. I’m sure that many married Catholics out there experienced considerable fear of being open to life and potentially having 10 kids…but that’s a fear that we all need to fight because it’s a simple fact that God NEVER gives us more then we can handle!
For example, when I was in my teens, nothing scared me more (on the surface) then the idea of having kids (much less a large family). But when I look back on my life now I see that a deeper desire to be married and have children had always existed and that impacted my choice of career when I was in University, the development of my faith after I finished school, and really every aspect of my daily life. Really, once I returned to my faith and addressed these fears, it’s quite clear to me that my true desire is to one day be married. Thinking about single life or the priesthood doesn’t really scare me, but they just seem like hollow existances and pretty soon I find myself day-dreaming about the future hand-hockey tournaments I’m going to have in the back yard with my kids one day!