My best guy friend just told me he was bi. I'm 100% not homophobic; however, things just feel awkward and different now. I don't know what to say or do; I've tried to keep things normal but its hard. Any advice?

Remember he didn't become bi yesterday. He's been like this for a while now, and your friendship never suffered because of it, so why should it now? Of course, knowing it makes it a little awkward, but it doesn't have to. Just let him know you're glad he trusted you with how he feels, and keep enjoying your friendship. It takes time for the awkwardness to go away, but that's normal. Treat it like finding out what color T-shirt he's wearing under his sweater: the color has the same impact on your friendship as the being bi thing - zero.