Feeling sad

I am feeling rather low today, at the moment all I seem to hear is sad news!
A few of my friends are going through hard times in their lives, all are slightly differant, but similar if that makes sense! I love them all to bits as if they are my sisters, we are all really close and sometimes thats worse as you know everything there is to know.
They are all talking to me about how they feel which really is fine by me, today another one of my friends told me some bad news, of course I am and will still be there for and all of them but I do think I am at the point where if anyone else leans on me I may fall over!
I will cope and they will all be ok, just need to draw on my inner strength.