Try not to beat yourself up about this. Let this just be a reminder that there are people out there that you can totally mesh with and connect on all levels. He isn't the only one out there I promise. I have adapted the idea that we all have numerous soul mates, people that we can just connect with differently than others. This can either be romantic or just in a friendly way. I have met many girls where I thought they could've been the one or they would have been great to date but something happened either similar to you, me or them were dating someone else, or some other weird circumstance. I used to let it eat at me that I might have messed up but after it happening so often, I felt validated in the fact that I was able to find people that I wanted to spend time around and viewed as potential partners.

If you don't find him I promise you will find someone else that will make you feel some way, if not more. What you did and you handled it is not your fault or mistake. We are all learning daily and always trying to get better. Everything is gonna work out.