But still, every company and employee needs to recognize that your coworkers and company are not your family - this only leads to misplaced expectations.
One of things that makes America so competitive, is the concept of at will employment - the company can fire or lay you off anytime and you can leave at any time too. This is a reality we must accept for capitalism to work at optimum efficiency. I realize this may seem heartless and cruel, but that's why you need to have work/life balance. Ideally work should not account for more than 10 to 20 hours of your life per week. Sadly, for most of us it's 40+ hours. It is outside of "work", where you can form relationships that mirror a family like structure - in volunteer groups (unpaid), friendship circles, hobby groups, book clubs, etc. More of our lives should be dedicated to such organizations for us to remain better balanced.