How to get over someone when you didn't even know you was in love?

Sophia
I work with a guy that I used to go to the same school with. He has a big reputation of being a player and not a very nice guy but when I work with him he's always so charming and know exactly what to say. At first I was not serious and was expecting all this from a player but it been a year of talking to him and we got very close, he's always there when I needed someone and I recently realized that he's constantly on my mind and I had admitted to myself that I definitely fallen inlove with him. But I also know that he will never be serious about me he's talking to a bunch of other girls. Even for myself I know that's he's the opporsite of what I usually want but for some reason it's just hurt me so much thinking that we won't be together. I need to get over him but working with him everyday is just hard to bear. Seeing him talking to others girls at work even distracted me so much. Since I'm talking to him I never feel any interest in any other guy. But I know I need to move on I just don't know how to and it just hurt me so much.