I'm attracted to guys but my mind occasionally wonders about her?

Well, there's this girl that I'm kind of good friends with, well, she was the first person I came out to and she was really nice about it and she always talks to me when I feel down and stuff. Now I can never get into girls at all on a physical level yet I can totally get into guys so long as they fit my picky type of guy but randomly, and I do mean randomly I think "I wonder what it would be like if me and ***** were together" and other stuff like that, never anything sexual or anything too deep but it's got me worried that I might actually not be as gay as I thought. Does it sound like I like her?