Co-worker's got a girl, but I still have feelings.for him
So I've been working with this guy for a while now, I can't remember how long, and I really like him. He and I are always flirting with each other and he's told me before that he thinks I'm amazing and that he wouldn't change anything about me. But... He has a girlfriend. I don't know what to say for fear of hurting him or his girlfriend, and getting hurt myself. I also don't want to lose his friendship.
What do I do? What can I say to him? Help! :(