I'm 26 and single and for the last 3 years I have worked for a large company straight out of college. A senior scientist with a PhD who is 10 years older than me was already there when I got there. From the beginning he was always nice to me and is very smart and has always been very helpful whenever I needed it. He's always been the calm cool person when I had emergencies and problems and he helped me so much.
I developed a big crush on him but never showed him or told him. But it made it hard to work with him. Even when he was nice I would get really nasty to him or "punish" him.. for what I don't know. For some reason I would always feel like he was some kind of jerk because he never came on to me, told me I was cute, whatever. I know that sounds stupid but I really thought like that. He absorbed so much of my crap for the sake of a peaceful working relationship.
He gave his two weeks notice on Monday. I was even meaner to him than usual this week. This morning he told me that I was a major reason he was leaving, because he was tired of dealing with my moodiness, unpredictability, and he said he was "tired of being there for someone who was never there for him". I then told him off because I was hurt.
I feel like a terrible person. He's done nothing but always support and encourage me, teach me, and honestly a lot of the professional praise I have received for my work has only been because of the help I got from him, which he never wanted credit for. He has barely talked to me all week and it's now obvious how much I depend on him for help.
What am I going to do? I'm going to be crap at my job without his help and I feel guilty because I totally abused someone who was always nice to me, to the point where he is changing jobs just to get away from me. Other people are panicking because a lot of us depend on his brain to solve our problems.
He's married. I can't just tell him I love him.

I developed a big crush on him but never showed him or told him. But it made it hard to work with him. Even when he was nice I would get really nasty to him or "punish" him.. for what I don't know. For some reason I would always feel like he was some kind of jerk because he never came on to me, told me I was cute, whatever. I know that sounds stupid but I really thought like that. He absorbed so much of my crap for the sake of a peaceful working relationship.
He gave his two weeks notice on Monday. I was even meaner to him than usual this week. This morning he told me that I was a major reason he was leaving, because he was tired of dealing with my moodiness, unpredictability, and he said he was "tired of being there for someone who was never there for him". I then told him off because I was hurt.
I feel like a terrible person. He's done nothing but always support and encourage me, teach me, and honestly a lot of the professional praise I have received for my work has only been because of the help I got from him, which he never wanted credit for. He has barely talked to me all week and it's now obvious how much I depend on him for help.
What am I going to do? I'm going to be crap at my job without his help and I feel guilty because I totally abused someone who was always nice to me, to the point where he is changing jobs just to get away from me. Other people are panicking because a lot of us depend on his brain to solve our problems.
He's married. I can't just tell him I love him.