Help please i wanna tell a friend about God. im christian?

i know he uses drugs and recently i heard him bragging about using extacy. he goes to my church. we used to be really close but now he slowly faded away from me. i can see he needs God & Jesus in his life. i recently fell in love with the Lord i want more and more from him. im 15 im blessed to have everything but one thing that i want the most is my friend rudy to be saved as i am. (: please help me. i wanna talk to him about God but im not sure how to. ive never tried to reach out to someone . thanks