Even if you were married, would that really make much of a difference? Having an unexpected pregnancy can effect a married couple just as well as a regular relationship.
You can marry at a young age remember? Having a child unprepared is the problem..being married doesn't necesarrily mean that much. Even if you love each other more than anything, if you don't have a penny to your name to support the child, kinda puts a little damper on the whole business.
What if a couple love each other, get married, bbut want to really focus on their careers?
Plenty of reasons out there. Stupid people can fall in love, stupid people can get married, stupid people can have a relationship. Love is blind aye?