There are basically 2 kinds of "relationship-people".
1) The people who are goal-oriented. They want marriage, house, kids, family, structure. They see relationships as something with expectations to be met and roles to be filled.
2) The people who are experience-oriented. This may not be the best terminology but it's the closest I could think of to describe what I am thinking. Also, this is not necessarily preclusive nor exclusive of "having goals" but is less about expectations and roles. Usually experience-oriented relationship-people are less concerned about accomplishing things within or via a relationship and are more about taking things as they come and working with what they find.
Figure out which one is more your style. Choose your partners accordingly.