What does he mean...........?

It's obvious something happened in the past that makes him not want to love you like he use to. Either he did something wrong or you did something wrong to lose each others trust. The best way to regaining love is by regaining trust. Without trust, there is no hope, without hope, there is no faith. having no faith in someone means you most likely don't trust them either. Regain trust. Regain love.