Sex is a VERY intimate thing, and even when people have a non-sexual relationship one is bound to care for the other more. Don't worry, it's perfectly normal.
yup... I would think so ... you can only be 'intimate' for so long before emotions start building
yes it is and once you cross that line there is no going back. unless you keep lying to yourself. good luck
yes is normal because at the end that friends with benefits doesn't work well