Do I Like My Best Friend's Brother?

Me best friend has an older brother who until recently i hadn't met, but she had told me a lot about him and he sounded really cool. So anyway I had never seen him (because he works a lot and he is hardly ever at their house) until two weeks ago. We didn't really speak a lot , but i don't know... there was something about him...

Anyway, we both play WoW and last night he inveted me to his group and he was helping me with my quests and we were kinda talking for a long time.

So i went to bed I had like three different dreams all about him.
First I saw that my friends had come over and he came with them and when I left where we were sitting for a while and went to my bedroom , he followed me and he kissed me and etc etc
Then I saw that i was at my friend's house and she went to the bathroom and her brother appeared at the couch next to me and was trying to touch my hand but somehow couldn't.
And then i saw that he just knocked on my door and i opened and well etc etc.