Please advice me,i want to understand him?

Well Dear.. I suppose he is just flattering around you.. Looking at you and introducing his mates.. is not the expression of love.. there must be few more guys also looking at you the same way. but the difference is just that you noticed him. thats it... If he would have really loved you and wanted you in his life... he would have come running to say you. I LOVE YOU.. I think he is just doing time p.. well you can enjoy that time p.. but just see to it. you don't get serious... and why should he get jealous when you talk to other guys.. means he doesn't believes in you.. He is truly loves you,he would never ignored you rather than see you happy.. THE PERSON WHO LOVES WILL ALWAYS TRY TO SEE YOU HAPPY...