When my best friend and I met for the first time I thought he was interested in me romantically. He shut me down and he didn't do it in the nicest way. I was upset and kept my distance from him for a few months. We reconnected and became really close. About the three years ago he abroad and said we should just get married. At this point in time I had no feelings for him, however I thought he had feelings for me.
He continued making comments about us having kids in future etc and I actually considered giving it a go. However when he came back to the UK he acted like we hadn't even had that conversation. It was so weird, I mean in my head I was thinking we could end up being good together.
We are still pretty close, he's in a relationship now and I definetly don't have feelings for him. The way he acted both times has bothered me a bit over the years... But yeah I believe that it if often one sided and I'm the beginning one person probably likes the other.