I did a PhD interview on 22nd of November, with high hope, I believed i was going to be selected because i have sent my CV and summary of my master's thesis to the group leader. After my PhD interview he told me he knew my supervisor and even told me to extend greetings to him he then continue by saying "i was the best applicant so far" so he told me to send my full master thesis to him and he will in return send me article related to the PhD programme i applied for.. I did and he sent me some article. Its been almost 2weeks now and i have not heard from him. Does this mean he deceived me and reject me? Why will you send article to student you won't pick for a phd? I am really confuse here.

Hi. I am sorry to hear this but I am not surprised. Most academics are or think they are too busy to reply to prospective students. They tend to change their minds. Their enthusiasm to prospective students might suddenly drop. During communications with potential supervisors, they might disappear forever or reply after a year.
Nevertheless, two weeks are not that long. Be a bit patient but keep in mind that without a formal PhD offer, all possibilities are open. Just apply somewhere else and if you get a positive reply from him, go forward with it. It is a general problem in academia not personal neither to you or him.