Why do you put yourself on an emotional rollercoaster about everything?
Your GF was the best thing ever to happen to you and you were never going to leave her side. Now, she's history and you're trying your best to pretend she never mattered to you.
Your job as the greatest blessing to happen to you in a long time and now you're committed to walking away.
I'd say the stress of going overboard with overly-zealous devotion is not worth it. I hope you learn to not put yourself through it anymore.
And, if you're at work 8-9 hours a day, with 1-2 hours at home, getting ready for your work day, that's still at least 5-6 waking hours at your disposal. That's plenty of time to do meaningful employment searches. I know, spending your off-time relaxing or goofing around on the internet, watching tv or listening to music, are difficult habits to break. But, you need to learn to do so. That's part of adulthood: learning to put responsibilities in front of recreation. We've all had to learn to do that. Children put recreation before responsibilities. Adults have to do the opposite.
Take care and God be with you.