Relationship? Affair?

Can a true relationship come out of a lustful affair? It is hard to say if you never experience it. About three months ago, having sworn off one night stands, I allowed a very handsome and interesting man to seduce me. We saw each other once I stepped in the bar and I walked straight to the stool chair next to him. It was a pleasant evening talking to a good looking guy with vast knowledge of everything. After few drinks and we felt we were clicking to each other, we were heading to the 5 star hotel nearby. It was very passionate and I began thinking monogamously, which made him retreat. We still see each other as "friends" with no sex and only some flirting. I still think he's great and my respect for him grows, and I think his appreciation for me is maturing. Just wait and see...