HELP ME PLEASE

So I've liked this guy for a long time, then I got a call from my friend saying he was dating someone else, and I was fine, but I could still see myself dating him. 
But after I found out they weren't dating and it was a joke, I wasn't relieved or happy. I was just normal, but I still like him.
Then I found out my best friend likes me, and when I heard about this, I couldn't ello but smile. 
What does this mean and what do I do!!!