Weaken? Probably not. However with only 24 hours in a day it is likely between work, sleep, and spending time with the family (you have created) will take up much more of your time. This is natural and to be expected. More often than not all one has to do is look to their parents to see how much time they spend with their grandparents or their siblings. Just because you spend less time with someone does not mean they are any less special to you. Thankfully there are holidays such as Mother's & Father's Day, Thanksgiving, Christmas, and birthdays where most people make time to get together.