Did God create angels as messengers only...? What is your heavenly hope...?

Angels are whatever God commands them to be. Some are guardians like our guardian angels. Some are messengers and some are leaders in War like Michael the Archangel who warred against Lucifer who was also an archangel and sinned against God in heaven. Michael and his army of angels kicked out Lucifer at God's command. Angels are guards also since there are some placed at the gates of the Garden of Eden so no one can find it. God posted them there when Adam and Eve were kicked out of it and no one has found it yet. Angels serve Almight God in whichever way He commands them to. As far as us being like the angels, Scripture says God created us better and above the angels and they serve us by his command. What that scripture means is that Angels are not married and neither will anyone else be in heaven. You won't need to be. After Armegeddon, the angels will be commanded by God in whatever way He needs them to be in the new heaven and new earth that God plans to create when he destroys the old ones due to them being tainted by sin.