I got good news today...So why am I not more happy????

Today I got the phone call I have been anxiously waiting for the past 2 days. The lady who manages the townhome complex I applied for called to tell me " Congratulations you can start moving in next week if you want to" As I came home and started packing up our beautiful home we shared as a family my joy quickly turned to sadness and regret. Every closet, every cupboard,every box had a memory. Some funny, some sad, some made me angry, some made me laugh, but most of them made me cry. I just kept asking myself "WHY" WHY WHY WHY???? Why did he do this? Why didn't our family make him happy? Will I ever laugh again? Love again? Breathe again? It just doesn't make any sense to me!!!
I know i'm supposed to be happy I found a little place for myself and the kids and the dogs to start our new life in. But...as i'm packing up 22 years of memories into boxes and driving them down to my storage unit tomorrow I just can't help but think "There's goes half my life in these boxes and now there are going to be locked away for God knows how long" And that just makes me sad. Like it was all for nothing. I feel thrown away too. Like nothing I did was ever good enough and I just waisted 22 years of my life. I'm right back where I started from when I met him. In an apartment with my little boy...