Like "Its OK if no one calls, they all have their personal lives, are busy at work and I should be happy for them?" :) Doesn't work!

I'm not sure I'm verbalizing it right but I just don't understand how it happen that when I do need support from friends I don't get it? (Yes and I have thought that I might be the problem). On my part, I always try to "be there" for my friends, be it a little thing or something major...anyway, can't help but wonder...