I fell in love with a married woman

I am a 25 year old lady and about a year ago, I started having feelings towards my boss' friend. I used to work as a nanny and my boss' friend"who is a married woman " visited alot. She was very nice to me, and I liked her. Months passed and I still couldn't get her out of my head, and I felt like I was going crazy, I mean, I am straight, so having those kind of feelings really confused me at the time. Alot was going on at work, and this particular day came and I quit the nanny job.. But the main reason I quit was because I thought that If I left and not see her, I would stop having feelings for her... Because to be honest, I couldn't control the fact that she visited her friend alot and I had to be there and see her and not be able to even look her in the eyes. Anyways, it's been almost a year since I left, but I'm telling you, it's really hard, because my feelings for her have grown, I don't know what to do... I think about her everytime, I try to keep busy but I just can't stop.. I think I'm obsessed or something... I even dream about her... I need her, I want to see her and hug her soo bad, but I have to remember why I left... She is married,... Please just give me suggestions on what to do, I want to forget her completely, even when we maybe accidentally meet, I don't want to have feelings for her anymore.. Please what do I do... She doesn't know that I have feelings for her, I've never told her...