It's going to happen. Maybe not today. Maybe not tomorrow, but it will happen. You are going to pray for something...and not get it. It happens to everyone who prays. When it does, you will most likely be tempted to get angry and tell God a lot of things, like how He doesn't love you, how He has abandoned you, how He needs to tell you what it will take for you to manipulate Him into giving you whatever it is you want. Can I offer you a thought?
God isn't a human being that He abandons His children or that He forgets to value them or that He can be manipulated by human word or action. He's God, and He is a good God, who gives good gifts, and it just might be that this house or job or relationship or pony or vacation or whatever you think you have a right to really isn't a good thing for you right now. I know that is hard to fathom in our all-about-me society, but it is true. God is a good Father, and He gives good gifts, and sometimes that good gift His telling His children no.