Live some life together, out of the bedroom, and see how the relationship part of the partnership goes. It will become obvious if there are lifestyle or emotional differences. And when you keep the raging hormones at bay you can see this person without the rose-colored glasses.
Keep sex out of the game until you are sure you want to give this relationship a long-term shot. Sex clouds everything. Sex blinds us to the red flags that could be burning right before our eyes. When the sex hormones kick in we are no longer capable of making rational decisions.