Oh, lordy. I read your post.. I spent about 10 years on the dating sites. First thing I learned, they didn't want to spend a lot of time communicating thru email. They didn't want a lot of discussion about emotional history or even about philosophy of life, etc. I wanted to email and learn about the person. They wanted my phone # and an upfront meeting right away. I accommodated, to my regret! I allowed myself to become involved with them, despite misgivings.
You are very smart, obvious from your post! You also have the ability to meet someone who is worthwhile, but I'm not sure you will be able to do this online. There is this online dating etiquette, and it's fast and aggressive. I liken it to throwing a hook into the ocean and pulling out who knows what kind of monster.
It is too your intelligence and credit that you never became intimately involved with this man. That's a whole other bag of worms that opens up much more insecurity. You are a strong woman. I admire you!
Also, you are young! 37 is young! You can and probably will meet someone, friend, just maybe not on the dating sites!