An empty heart

Half of 2008 has passed and I still feel emotionally down. I feel as if I'm treated with no respect and very lowly. I feel very frustrated pratically everyday and many times I feel very much like crying my whole heart out, but it is never easy for me to cry.

What is making me feel this way? I, myself is still searching for that answer. I have a good family, an understading boyfriend and my group of friends yet my heart is still feeling empty like something is missing. Where is the happiness which I have before?

I feel like running away as far as I can. I'm not running away from my problem but away from the people here. I can't see to have the happy feeling like my colleagues who are so happy everyday.
There are so many things I dream of, yet I haven't achieved it. So I'm not satisfied with life. I know I won't be to get everything I dreamed of, but until now I have achieved at lease 40% of it. I know that is good enough, yet I still feel so sad and empty.
At this moment sitting infront of my pc, I really feel like crying.