I guess I feel it is quite possible to love a friend, I don't see them as one or the other situations. So I think it is quite fine and natural to keep strengthening the bonds whether or not it ends up with you dating or not.
So spend more time together, do things which are thoughtful and emotion-sharing. See romantic movies. Go to museums where you talk about the sculptures and artworks. Go for long walks in the woods. Talk, talk, talk.
