offer information about yourself to him and see how he replies. this shows him that you are comfortable enough with yourself and with him to share personal things with him. in turn, ask him questions about himself, not too personal. bring up topics that you think he would enjoy. did he see this movie? did he listen to this band? find out what types of things he likes to do and go do them with him. learn from him about those things. ask questions and show interest. laugh with him and be easy-going. afterwards, discuss the event you attended or activity you enjoyed together.

has he got friends he hangs about with? you have too? great, you need to find a way to get the whole groups of friends together. If you have conversations in groups then he's more likely to join into any talks. Once you get yourself to that stage, its all on you, him and body language. stand nearer him in the group, talk to him and give him the eye contact - even if it's only one sentence. show him your willing to talk and he'll eventually come round