Should I wait until my boyfriend becomes a better Christian?

Question:

My boyfriend and I have been dating for four years. He waited six months before we had sex. It was my decision, and I regret it to this day. I wish I knew back then what I know now. I'm afraid if I stop having sex with my boyfriend, he'll leave me, and I've already invested so much into this relationship. I'm a part of his family already, his mother takes me as her own.

I recently watched a few Christian movies that inspired me to worship God wholeheartedly. I'm only listening to Gospel songs nowadays since the songs of this world have no meaning to me anymore. I've become hungry to learn more about Jesus. I want to be one of God's disciples but I feel like my boyfriend is holding me back. But I want to move forward with him, through God. I just know God planned something great for our future together. I don't want to miss out on His blessings. My boyfriend is a good guy, he is honest, loving, and caring. He is a good father (his kids from a previous relationship). But he is also the silent type. We share the same faith and everything, but my problem is that he doesn't talk about God, he doesn't acknowledge God (that's what I think). I know I can't change him but I'd like him to shout God's praises (if that even makes sense). I want him to be a man of God. I want our future kids to look up to us one day. I want to set an example. Maybe he feels that if he starts worshiping God wholeheartedly then he won't have as much fun as he does right now. I don't know. I really love him. He gives to the poor, he will even give his last, and I can't see myself with anyone else. But what can I do? Do I just sit back and fight this battle with prayer?

Thank you in advance.