The mistake so many people make in taking relationships further, is revolving their entire life around their significant other rather than integrating their life with that person.
When revolving your life around someone, it is so easy to lose track the life you once lived, and the people that you've once held close. You'd often lose yourself and everything that your significant other once enjoyed about you.
What you should want to do is integrate this person into your life. This way you can study the level of interaction this person has within your lifestyle. It is ok to not agree on everything. However, if you are close to your family, and your significant other isn't, the possibilities of this person pulling you away from your family are pretty high.
So Integrate, and never Revolve...