This happened about 15 years ago, several years before meeting my wife. I was single but she was not. No, we didn't have sex, but we had an online "romance". She seemed like the perfect woman - we would chat for hours. She had 3 children, and I knew all about them. She was married, but not happily. We chatted just about every day, for hours at a time. We exchanged photos, normal as well as nude, of each other, and she sent pictures of her kids, their trip to Disney. We sent things to each other in the mail - she gave me a friends address I could send things to. She was talking singing lessons, and she taped a song she sang for me - I played that cassette over and over. She sent a scarf with it, scented with her perfume. We never met - she lived in Michigan, me in New York. I can't believe it, but I actually fell in love. We talked on the phone, talked about living together, talked about the kids - although I didnt have any, I was ready for the responsibility to be with her.
Then finally, we both realized this was crazy, and we stopped. We exchanged emails once in a while for a bit, and then that was it. She tracked me down once since then - right after September 11th, to make sure I was ok.
Now that I think back to this, I cannot believe I did this. I just hope I did not hurt her or her marriage.
That was the one and only time I ever got close to someone on the internet.