Did I send the wrong message?

Last night I got slightly tipsy going dancing with a new friend (who has been friends with my sister for a long time). It was really fun, but I'm not interested in him as anything more than a friend. At the end of the night I was going to take a cab home, and then he said why don't you crash at my place and we'll watch a movie. He lived much closer and I didn't want to spend the money on a cab, so I agreed. We watched the movie in his bed during which I fell asleep, and nothing happened. This morning when I took the bus home from his place, everything was normal and I didn't hug him when I said goodbye, and I added thanks for letting me crash cause it saved me cab money (I said this to make sure he got the hint that this was the reason). I really regret sleeping in his bed with him even though nothing happened and I feel I was unflirtatious throughout the night etc. My question is, is it very likely that he thinks I'm interested now? If it were you, would you be convinced that this meant I wanted something more from him, or would my other hints and otherwise casualness of it convince you it was platonic? Is there anything I can do for damage control? I want to keep him as a friend but I don't want him to think something's happening.