I can ' t tell you how many times I ' ve looked back on my high school years and regret every moment where I knew a girl was giving me signs of interest . I regret each moment where I didn ' t act on the obvious . I don ' t know what situation you ' re in with this girl like if you take the bus together , you sit next to one another in class , you eat lunch together , hang with the same friends in school , etc , but I do know that you will regret not having talked to her if you don ' t do anything right now . Approach her and bring up something random that you both relate to . Talk about class or whatever you know you have in common . It honestly will not matter what it is , since if she likes you , she ' ll laugh and smile at whatever you talk about . Starting the chat is half the battle here .