It's normal to put yourself first every now and then. After all, if we constantly bend over for everyone but ourselves -- the demanding boss, the friend who's always broke -- our well-being will eventually take a major nosedive.  The people we have to be especially wary of the ones who take, take, take -- but never give back. Relationships are about scratching each other's back. But this doesn't necessarily mean they always have to be 50/50.  There will be times where one person is more in need than the other, whether they're struck with an unexpected illness, they lose a loved one, or they get fired from work.  We all have to contend with adversity at different points in our lives, and we often turn to friends and family for support.  But what if they fail to accommodate you even after we've been there for them countless times? It should be an indication that they're in it for themselves. I can understand their not being able to lend you money each and ever...