I kiss female friends on the lips, minus the tongue, and hug them a lot too. At least the ones I'm close too. Don't see anything wrong with it. A couple have shared my bed too. I see it as a sign of trust and friendship, not a gateway to going out with them. If I wanted to do that I'd ask.
but you dont do it all night and you dont become intimate, lots of feeling and touching etc...If you do then its not friendship.