Hi.
I have ups and downs. We all do I guess. But when I have a downer it is very intense. Yesterday was my anniversary with my Fiancé. She planned this nice romantic evening. But I had work obligations and had to work very late.

So I started getting extremely upset, especially after we waster 3 hours waiting for people. I felt like I did all this work and planning, but then I am being punished for other peoples mistakes.

I only got home 5 hours after my usual time. Dinner was cold, and only remnants of what would have been great night remained on the porch. I was angry, and took it out on my boss and co-workers. I made a big scene, then my boss eventually chased me out of the board room. So I went home.

My fiancé understood, and was very patient with me. I love her so much. But I still cannot help and feel this extremely irritible attitude towards work. I was told I am being a negative influence on the others.

I did rant quiet a bit with the co-workers.
How can I grow past this, to work issues out on my own instead of going off at the nearest person?

I feel like crying right now... trapped between two worlds.

It sounds very much like you need a holiday very badly.
You need to take one.
When you get back with a fresh mind, you need to assess whether you are in the right job.
Get some professional advice.
Are you happy where you are?
You need to investigate as to whether you need a change.
Do not leave your present employment before you can secure a better one.
Better does not mean more money,
Better means that you would be happier.
Take it easy and get the support of your loved one.