I am in an a strange situation that bothers me quite a bit. My co-worker seems to have a crush on me. In fact, crush is an understatement...

We are both married, so a relationship is not an option. Nevertheless, I care about him and hate to see him like this. We started off as friends, our conversations were always interesting (at least to me) and we treated each other really well. About a month ago I started noticing very clear signs of attraction from him, which include a lot of eye contact, touching "by accident", smiling way too much and so on... I realise that that the first signs must have showed months earlier, I just didn't make much of them. Anyhow, over the past month things were progressing and he does not seem like the same person anymore. Not the person I liked so much, now he is somebody else who makes very little sense when he is around me. He tries to keep it together, but I can see right through him and it breaks my heart. I try to keep it cool and act as everything is as it was, but at times he does something (like blushing for no reason) that completely puts me off track. I can see what he is going through and it hurts to watch. How I wish I could help...

In a different world I guess we would be great together. But things are as they are... Is there anything I can say or do to ease his pain? If you were hopelessly in love with somebody you cannot be with, what would make you feel better? I'd like to hear some thought, especially from guys.

===EDIT===


I realize I have omitted some facts that are relevant... So before you jump to conclusions, here they are:

1. He is my direct superior. He hired me and can fire me.
2. I did not actively do anything to make myself more attractive nor did I leave love notes on his desk. However, if he calls a meeting, I have to attend it.
3. By "hopelessly in love" I am giving him the benefit of a doubt. He has power over me, I have zero power over him. I don't known what goes on in his head and I can only guess what his intentions are.
4. This job made me happy. I am prone to anxiety and depression and I was depressed for a very long time. Reaching out here is my last cry for help before I quit (which I cannot do on very short notice for practical reasons, such as health insurance...).
5. For all the reasons above, I can only slightly limit my contact with him, which I do already. I do skip some meetings.

I am looking for advice whether there is any way I can try to revert the relationship to its previous state where we could work together.