dude go nicely, and ask the girl ke aapse akele main baat karni hai kuch give me just 5 minutes, start with your introduction like your name and batch and simply tell her that you're interested to marry her not that you love her or you want to be a friend. Ask her her number or email and if she doesnt give you then give her your number and email, then see if she contacts you, she will definitely discuss at home (with her mom sis or friend) and might contact you in few days. if she doen't then at least you made your stand clear to her. Will figure out something else.