PLEASE ANSWER!! Am i Bisexual?

Okay so i have this friend and she's bisexual iv only known her for about a month..and im ALWAYS thinking about her. i get jelous when she's with other girls or boys and i just love to be around her. she has this video on facebook of her rapping and iv watched it that much in the last week ive memorised all thw words and i always have the rap stuck in my head. it scares me coz i've never felt like this about a girl before...am i bi?