How do I act "normal" after coming out to best friend?

First of all, congratulations on coming out to your friend! Especially at such a young age.
I'm going to assume that this is recent, so it will definitely take a little bit of time for him to adjust to it. If he ever says something that truly insults you, then let him know. I'm not sure the best way to make a joke out of it since I don't know how the younger generation reacts to certain jokes, and since this is recent. Just try to keep the jokes innocent and clean, unless he makes a joke that is PG-13, lol.
I would suggest that you don't tell him you have a crush on him, though. This could definitely make things more awkward for you both.

 

Hi Treader, I came out to my best friend a couple weeks back. We talked about it initially, and I let it sink in for him. About a week later, I told him I wanted to talk again, so we had a great discussion that was basically Q&A for the both of us. Slowly, I started mentioning gay issues casually, and now we have a fairly comfortable dialogue going. It was weird, and still is kinda weird when I think twice about it. He's my best friend for a reason; we've been through a lot together and have always been there for each other. Your friend will love you for being you, and a lot of the awkwardness is probably manifesting in your own insecurities. Totally normal! When you feel that awkward tension, take note, and ask to talk further about it. Eventually, both of your insecurities will subside.

On the issue of liking your best friend, you should tell him, but make sure to tell him that you want to remain friends and that you enjoy his company as a friend. My friend told me he thought I was very attractive, and I was the only guy he has felt that way towards. He also stated that we're best friends, and he wouldn't change that for the world. He has a serious relationship with a woman, and I love them both. The only reason he told me that was to get it off his chest, and you should to. Our friendship is stronger now and there isn't an elephant standing in the room anymore. Be brave, it is rewarding.

 

Wow! Just 2 days ago? XD That's extremely recent! If I were you, I'd wait on the jokes. Give him a little bit of time to adjust first, like maybe 2 weeks. Until then, I'll think of some clever jokes for you.