In love with a married man

About a month ago I started a new job, met new people and life has been good. Well one of my co-workers and I have become extremely good friends. I literally adore him and respect him on so many levels. But every time we are together at work only I get butterflies and my heart starts the race. I feel terrible. He has a wife they have been together since they were 19 and now we are 25. I will never be with or pursue a married man but I feel like a horrible person for even having these feelings. What can I do? Give it to me raw I know this is wrong 😞