Emotional baggage - where to leave it behind?

It's interesting how emotions work/dont work.
I have absolutely no idea, sometimes, why I feel the way I feel or why I'm not feeling something I think I should be feeling.

Last night, as I was practicing playing the guitar I decided to try to play one song. This is a beautiful song but I realized I hadnt heard it for almost 8 years but I sometimes think about it.
The reason I think about it is because I relate the song with a very sad and hard decision I had to make 8 years ago.
so of course I have gone out of my way to not hear it.

But somehow yesterday I though I would give it a go, especially since I would just be badly playing it and singing it myself.

After the first 5 worlds I just burst into tears.
I felt all these emotions, sadness, lonlienss, regret, wonder and lack of hope, just fill my consciousness.
And I couldnt stop crying.

I have often thought about the decision I took and I dont regret it.
I have come to terms with it, I even made sure I will always remember the choice I made and why it was the right decision.
I have talked to family about it.
I have cried, I have smiled, I have been hurt and I have been satisfied.
so I thought I had worked through my issues.

Yesterday, after only 5 words from one song.. I am not so sure I have worked through them all.
why would I cry if there is not something that is bothering me?
why cant I listen to a song that reminds me of hard times, when I believe I have made peace with my decision?
why are emotions so hard to control or even to understand?

Maybe my issues run deeper than I expected.
or maybe its not the decision I'm still having problems with, but the fear of no future possibilities.
maybe it's the fact that I'm losing hope, more than strengthen it.
maybe the decision I took many years ago, scared me in more areas than I knew.
Whatever it is, there is still some emotions lurking around, making me realize I need to do something more than I have been doing so far.

I just dont know what!
-with love-