Hi Charlie thank you for your question.
I would start by telling your friend your orientation. Is he aware that you are bisexual and, if yes, can you tell him that you like him as more than just friends? The way that he is acting certainly makes it sound as if he is interested. If he is not interested, then you both need to clarify it or you will continue in this state of confusion and this will likely make it harder on the relationship in the long term. I find honesty is the best policy and, if he is a true friend, he will stick by you regardless of how he feels about you intimately.
Take care and good luck.
Lorin for Alterheros