You cannot say that Grissom has done nothing for Sara. Grissom has always been there when Sara was in need. Have you ever seen anybody else? Greg? Nick? Warrick? no none of them.
They're not even there as friends. One of the best example would be in ND. As emotionally available as Grissom tends to be, he atleast went to Sara's apartment to understand whats wrong with her...he hold on to her hand, which was a support. Support is not always about making physical contact.
This is one statement I cannot agree with. I've tried to see it in different ways with little sucess, but in ND, I have to doubt that he went there just to find out what was wrong and give support. Ecklie wanted her fired, he went to get some answers. He's her supervisor; It's the same deal as when Warrick was supposed to be fired, he sat down and talked with him. Just in this case, everything came loose. What else could he have done? If he did nothing, and just walked out, it would have been far beyond rude.
You also state that no one else has been there for her, and there could be several reasons for this, ranging from them not knowing what had happened (Suspension in ND, attack in Commited for examples), possibly not knowing where Sara lives (Grissom knows where she lives seeing that he gave her a ride home after her DUI)
Also, just because the writers don't express/show it happen, doesn't mean that it doesn't. Try reading between the lines.
Grissom has been there for Sara, in one way or another, but so have the others. Greg talked to her about her supension in the following episode, a simple gesture showing that he was concerned.
I'm not saying Grissom hasn't been there for her, but I think it's read into way too much. Grissom is her supervisor, whenever something goes wrong, he is the first one they contact, and then it becomes his concern. It's unfair to say that it is because of his love and concern, because he would be there for the others. Example in WW, when he saw catherine with the cut on her face, he wanted to know what had happened. He was there for Warrick in the first season more than once, he was behind catherine in pwf, he was there for nick in GD, and so on.