Just thought I'd update you all and thank you for all your advice. I really needed to hear what all of you said in order to feel confident in my decision.
I decided to go ahead and talk with the Bishop today. I decided that if I was still feeling the pain of my actions, that I needed to take that final step, and talk to the Bishop.
I feel like a ton of bricks has been taken off my shoulders. The Bishop said that if you feel prompted to tell him about something, even if it seems like you shouldn't need to, then just to talk to him. He said that the reason confession is so powerful and necessary in the repentance process is that it shows humility and a willingness to do all that is necessary to make things right with the Lord.
I finally feel at peace about my past! I no longer feel pain at the memory of my past. I am amazed and so grateful for the power of the atonement. I truly did cast my burden on the Lord and I don't need to feel horrible guilt every time of I remember.
Today as we sang songs for our Christmas program in sacrament meeting, the words had so much more meaning. We really can feel peace when things in our lives are right with the Lord!
Thanks again everyone!!