Here are two posts on how to start a conversation:
http://www.howtoattractagirl.org/how-to-start-a-conversation-with-a-girl-part-1
http://www.howtoattractagirl.org/how-to-start-a-conversation-with-a-girl-part-2

Am doing my degree and and the girl whom i like is doing her Puc in the same college,She is 2 years younger than me. Its been a long time i have been liking here even she gives me look sometimes but am not understanding how to approach her and how to express my feelings for her, She is a stranger to me. I’ll be very thankful to you if you provide me with some tips how to approach her and keep my talk

You have friends, a sense of humor, and can converse about interesting subjects. This makes you an interesting person so don’t allow her reactions to convince you that you aren’t. If she finds you uninteresting, it’s because it’s been a year and you haven’t made any moves. This is way too slow. It’s only natural that she would direct her interests elsewhere. By this time any attraction or sexual tension she may have felt in your presence has long since evaporated. You need to work on your fear of failure. Experience comes at the price of having a few failures. It’s just a skill that you have to learn. If you fail, it means you haven’t mastered the skill and has got nothing to do with you as a person. Unless there’s an actual relationship going on, you shouldn’t limit your prospects to just her. To rapidly get more experience and get a girl in your life more quickly, you should “play the field”.

I have this girl tho, I really love her, but I can percieve that she finds me uninteresting… In her presence I become a more confident person but also more boring, unlike how I would otherwise act, more mysterious and “funny”(by nature). I don’t have a clue on how I should act to attract her, but I wont stop trying, thats for sure. I’ve been around this girl for like 1 year slowly advancing but don’t have the courage to make any serious move  afraid of the failure. I have a hard time understanding their mind… How should i act among my friends? Because to her it seems like it matters alot how you are not only when talking to her, the only moment she finds me more interresting then usual would be if I come up with some interresting subject/coversation when talking to someone. Also we are both young and I belive she is more experienced then me but also very inexperienced. So ANY idea/tip would be very appreciated! 
Frank