Hold you horses dear friend! How exactly do you know that she likes you? Does she smile at you a lot and talk in a friendly manner? Does she laugh and think you are a tad crazy? Well, these could be just normal signs, girls are a little more friendly than in compared to boys and them being nice doesn't really mean they are going gaga over you. If you do not want to spoil your chances with her then do not ask her to be your 'girlfriend', instead just be around her and show her the kind of man you are. If she likes the man that you are, she will show you 'sure signs', you would not have to just think. So, wishing you all the success with your queen of Spades, just take it slow and easy is what I have to say.