well first of all you have to believe in yourself because if you dont then you have more chance of failing!i mean believing in yourself is one of the most important things in life!

and two you need to try and get a little more closer to the girl. give her some signals maybe to show her your intrested and im sure that she'll know how you feel. or you could confront her about it which is the best way but it would need alot of guts and seen as im a really shy person i wouldnt do it im sure ur different then me and you'll definatley do it good luck