You were probably just "fallin' in like". lol. Cuz if it was love you'd have been on Google (or Google maps) looking up therapists/clinics in your area to get her help. If it was extremely strong lust or real love...you'd even pay for said help.
The freindship thing is cool, but at some point she'll expect you to tell her how you feel about her and saying "I'm your friend" wont cut it. There's big differences between friendship, like, love, and lust. If people knew them then we wouldn't have soap operas.
We still haven't touched the arrogant and stupid part (which I think would make the discussion really interesting), but I'll leave that alone.