Welcome to Fluther. :) I think subconsciously, you did like this girl as more than a friend, but you just didn’t realise it. My Psychology teacher didn’t really go into too much detail but she once said dreams open up the subsconscious. I don’t know about the football match but I definitely believe that the kiss is a reflection of what you’d like to happen in reality. As for what you should do, well, I’d ask her out on a date, assure her it doesn’t have to be anything serious, and then discuss the possibility of you two ever being together as more than friends. :)