how wud i know that it is already love... can anyone tell me

it's only you who can answer that question because it's you who have that feelings for that person. You didn't even give any example how confuse you are with your feelings or how's your feelings for that person.

That's a very sad thing. May i not offend you but you should not have asked that question to other people. You should have addressed that question to yourself. It is only you who could know it. The feeling of love is subjective to each person. Ask your self for a hundred times or even a thousand times if it is really love. And also, ask God wither what you are feeling is right.That's the only thing i could suggest....