Most Helpful Guy
Sounds like he's reflecting on what's important in his life and his true values. He's quiet because he's thinking.
He might have something (someone) else in his life that he needs to remove before he can pursue you, which is the right/noble way to behave.
I seriously doubt that he wants to just be friends. I think it's more likely he genuinely cares about you and wants to make sure everything is in order before he takes it further.