My SO is addicted to masturbaring. How can I help?

We've been dating for 2 years and a half and our relationship has had ups and downs. I am the kind of girl who needs to hear some nice words or have that physical touch and the downs are usually because he stops doing that. Today we had a conversation about that and he told me that he was addicted to masturbating and that it might be affecting our relationship. He told me that whenever he does it he feels nothing. Like he looses all feelings and he thinks that maybe that's why he's not giving me all te love that I need. How can I help him?? And how can we rekindle the flame that we once had??