pure and holy

So here I am in my walk with God......really struggling with some specific stuff. Humbleness, humility, pride.......you name it. I really make an effort to serve others, then I think "am I doing this to be seen doing it? Or for the sake of serving the Lord?" How can I do things with pure motives? In my heart I love help people I really want to do it. But I want it to be for His glory and not my own. How can I achieve this? I know I know Prayer!! The other day at dance practice Emory prayed "God make us Pure and Holy" and I wanted to cry out "this IS my hearts desire!!" When you are planning on going to the mission field people expect you to be a certain way or think a certain way. But just because I'm on my way to Mexico does not mean I have it all figured out. I'm a person same as you....I'm not special and I'm not any more qualified than you are. I'm just willing.....This is also frustrating. There are pressures all over in the church. To think and feel the way they say. But I don't always agree. I'm really having a rough time figuring things out right now. I know God is doing a good work in me that will be completed in his time. I'm a work in progress.......