Someone needs to take away my man card!!

I just returned from a week long conference for work. After the 12 hours of meetings we all went out and drank, a lot! Somehow suffering through these meetings with a hangover made them better. Anyway about 2 months I had an amazing relationship end. I am still deeply in love her and having a hard time getting past her. At he conference I ended up talking to this lady, she was beautiful, we spoke all week, ate together, drank and really got to know her a bit. The last night she asked me to her room. Somehow she didnt have a roommate. She said I just a needed a good nite of sex to get over my ex. Then I said something I never thought would happen. I turned her down. It would have been a perfect one night stand, we would probably never see each other again. She lives on the east coast and I live in AZ. WTF!!! I still cant believe I did it, but I know its because Im still stupidly in love and i didnt want to end up crying like that guy in "forgetting Sarah Marshall" after his first one night stand. Someone talk me off the ledge.