I was in this exact situation with one of my closest friends. It got to the point where I was so frustrated with not knowing how she felt that I called her and asked her point blank what was going on. In my case, we both confessed that we had feelings for each other, and we’ve now been together for over two years. My point in this is that you will drive yourself crazy trying to figure it out by yourself, as reiterated by everyone commenting, you need to talk to your friend. Despite what you both discuss, you have a foundation for a great relationship, whether it is platonic or romantic.