What is this I we talk of?

I have come to a conclusion about something. In our lives we desire things and center our lives around ourselves. Everything is about me utlimately. The only problem is when I think this way is when I am the most unhappy. When I have periods in my life that I think of others well being before my own I am happy, joy fills my life, things make sense. So in friendship and love what if I look at that person and see what they need from me opposed to how they can fullfill my needs? What would happen? Would I be living within the flow of how things should be? Since I believe in God which means I believe in the Bible and the Bible tells us not to worry for God will take care of us. Then why should I be concerned that my own desires be fulfill since God is going to take care what I need to function to the best of my ablity? Life is not about me and the journey that I am taking is trying to understand that life is not about me. In some way maybe that is what life is about a journey to understand that you are not what makes the world exist.