["I felt guilty the other day for forgetting a close friend's birthday, just totally lost track of time.", "I don't think I have ever remembered a single friends birthday until facebook was created.", "Haha, true, I don't use facebook but this person has been a life long friend to me. I should of remembered!"]
That is true, were they upset?
I felt guilty the other day for forgetting a close friend's birthday.  We've known eachother for 15 years.