In terms of advice to be happy despite this crappy situation, I'm still learning day by day. And some days are still harder than others. But the main thing is to focus on what you have instead of what you're missing in your life. It sounds so simple but as you know....it's quite hard.
I already know this and need to take my own advice. The only way out of this slump is to focus on my blessings and give thanks for all that God has given me. I have so much to be grateful for and need to focus my energy on expressing gratitude.