I don’t have an answer but I can point out the problems with your question.
You have mentioned that - I am a cool & calm guy ,also a hot guy but no girls approached me. I don't know if they are scared of getting rejected
I am a bit shy can some one answer me why they don't talk to me?
1)Decide are you COOL OR HOT? If I was a gal I would consider you CONFUSED after reading the first line.
2)if you were Cool as well as HOT most probably someone would have approached you.
3) if you Genuinely considered yourself to be Cool as well as Hot you would have the guts to approach the girls
4)from your question it seems like you are the one afraid of getting rejected which you are trying to hide by saying that you are SHY.
Its valentine just approach gals and ask them to rate you and most probably you will get to know how COOL OR HOT you are from their perspective.
Lastly but not the least, just approach and try to be FRINDS stop looking at them as someone different and you may even find your Love Interest .
When you find that come back and ill tell you about kamasutra.