No, no you don't know that.
Just because it would help you or someone you love does not mean that God wants me to help. Maybe you think you want this but God has something better waiting for you. Maybe God does want this to happen for you but i'm not the instrument God wants to work through. There are a lot of possibilities. And no one knows the will of God. All you are doing when you say "I know God wants you to do this" is saying "I want you to do this and am using what I know about your belief system to manipulate me," which does not endear me to you or your cause.