I am almost positive certain he loves you deeply, but is terrified about destroying your relationship.
Furthermore:
Note that incidents like this show that, AT THE VERY LEAST, he is deeply respectful towards you, and wouldn't dream to take advantage of you in an improper way. He has had plenty of chances to behave disrespectfully towards you, but he hasn't done anything like that.
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1. I would say it is NOT uncommon at all, in any culture, that you have two people loving each other, but both are too afraid of losing what they both cherish, that they constantly skirt the real issue, and leave each other in the dark about their true feelings.
You two wouldn't be the first to have such a relationship!
2. Another occurring pattern is that either of the two persons, or both, do not quite realize to themselves yet that it is actually love they feel for the other, rather than just friendship. That is, the conscious mind has not yet integrated the correct interpretation of the feelings the person has himself.
In both cases, words need to be said; in the second case, he who didn't realize he loved will need some time to discover his feelings' nature.
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Lastly, I do not think you should be afraid to be open to him. He has already shown he is very respectful to you, and therefore, even in the off-chance that he feels JUST to be your friend (rather than being in love with you, too), HE is not the one who will jeopardize your friendship. If so happens, that your feelings are not reciprocated by him, it is YOU who might jeopardize the relationship by feeling too embarassed to meet up with him again.
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But, to emphasize:
When he talks like this:
"I said we'll tell me about your relation ship and he said I've become friend with a girl but she doesn't know and I told him so go and tell her and he said I know she knows that I like her she should say some thing now and then I became stressful and I just went silent and he start to explain you are my best friend I don't want to loose our friendship forever I done my best scientific project with you and...so on."
then I interpret this as a practically sure sign he loves you, and that he went as far as he dared in expressing his love to you. He IS shy, and it cost him a lot of courage just to give you that explicit hint, and he was hoping for that you would take it to the next step.
I believe that is precisely what you should do!
The answer to the thread's question: "How can I attract him?" is, therefore, quite simply:
"He already is attracted to you!"