Yeah I think that is the best advice I could give anyone in a relationship. Having a few different interests and not spending every second together isn't bad thing at all, and in fact makes you appreciate the time you do have together even more. Frankly, I love it when she has a girls night or dinner with friends etc, allows me a chance to put the Twins game on the living room TV instead of the Ipad or bedroom TV Good point on the "change" part as well, we have been together 4 years so I think we sort of know the areas that will never change (she will never care about NASCAR, I will never organize my closet) I think co habitation has helped a lot as well as we have lived together for 3 years, I think that is the period you learn a TON about what another and various little details.