HELP!!!

Tarrah
So a few weeks ago, my best friend (a guy) drove me home and before I got out of the car he kissed me. And, it wasn't a quickie either. Ever Since then everything has been so strange between the two of us. The way he looks at me is a 100% change along with how he talks to me, it's more flirtatious. We've discussed that we didn't want what happened to change anything and how we are just downright confused, but it still feels so strange and I'm not sure how to go about this... HELP!!!!