If he's ignoring you then there's a Problem with the relationship..try to find out what's going on an see if you can fix it but remember that relationship is based on a few things including communication which is very necessary..and if he doesn't talk to you..then you shouldn't be with him..
If you are being too needy and all over him, then he feels in control and will only respond when he's ready. But if you give him some cold shoulder treatment and act as if you have other things on your mind, then he will more quickly come to you
Ask, what you did wrong? Ask why he won't talk to you show you really care. Say something your going to do that he doesn't like and will tell you. Ex: If you don't tell me whats wrong i am going to cry, i want this relationship to work, but it can't if you don't talk to me. (fake tears)