Let It Go

I'm leaving my home and giving my life to serve everyone else around me. I know that I can't hold on to everything I have now and I can't afford to worry about everything I do now. So what do I release? What do I let God handle for me?
Well, I should let God take care of everything, really, but I've been asked to think of one thing specifically to let go of. Vespers tonight is the missions dedication program and each SM is asked to come on stage and place an item in a chest. This item is two things: a symbol of what you are releasing and a promise that you will come back. I thought about what I will put in the chest, as my promise and my commitment and I think I know.
I've had a silver locket from my parents for the last four years and at first I wore it because it was pretty. Then, after a personal situation that ended badly, I wore it as a reminder to be careful in who I gave my heart to. I had allowed myself to become caught up in childish imaginings of falling in love and after I realized what love truly is, I put up walls to protect myself. For the past two years, everytime I looked at it, I remembered to love selectively and without giving a part of myself. Now, I'm ready to love unconditionally and I'm ready to let God handle my heart. So, I'm putting my locket in the chest. I'm committing to love and I'm promising to come back.
But I'm scared to step out from behind my walls. I don't want to be hurt anymore. So my prayer is for the ability to release my heart. I need to give it to God. I desire to let it go.