How to tell if online Mr. Right is actually real-life Mr. Wrong

Dear Lauren,



A guy I knew over 20 years ago started messaging me on Facebook. In 3 weeks he sent me over 450 messages, all very flirty and about how he had a big thing for me years ago. We finally planned to meet at my birthday party but he cancelled the night before saying, he definitely wanted to meet up some other time. I told him I was coming off Facebook and if he ever wanted to catch up I gave him my mobile number. That was a week ago and I haven't heard anything from him since. I...