I think this happens to a lot of people all the time. You are attracted to someone, even if it is just on the physical level. Now you realise that making advances on her is not only a bad idea, it is also unlikely to work because she is married. You also know that even if you were successful you couldn't have any resemblance of relationship with her because you don't like her as a person. In short, if you do something it would be a disaster either way. You are going nuts about this because you see her every day. I think you should try your best to find a partner right now so you have an easier time forgetting about her. You could also think about how pointless any advance is every time you look at her. Hopefully doing both of these things will make you forget about her so you don't have to take option 3 and leave your job.