lo mate, i was in the exact same position as you are at the moment. There is this girl i really liked and i was not sure whether she had the same feelings as i did. We both smiled at each other, spoke on occasions.
I thought to myself one day, if i do not act now, the connection will go away and there will be no hope. I went into school feeling really confident, smiling etc. I happened to spot her by herself. I went over said hi and said something to break the ice, cant remember now. To my supprise she reponded in the same way i did. I know your nervous, if you keep thinking that bad things will happen, bad things will happen. It is hard
The thing is mate, if u think she feels something for you, then insinuating that you like her is only a good thing to do!
the fact of the matter is, if you start speaking to her much more, she will only react in the same way. This is based upon the fact that u both smile at each other already. Dont deny your impulses, they make you who you are