You can't be there all the time to cater the needs of everyone around you. There's no reason to feel bad about this. You have your own needs too.
I just hope they know this so that they'll stop making me feel guilty. I have always been providing. Is it a sin to think of myself every once in a while?
* Lesson for the day:
Never snoop around people's private things or you'll just end up disappointed and/or very very mad.