Welcome to the forum, and glad you finally found a little bit of time for yourself to post on here. From what you have written it makes plenty sense that you are feeling like the person you showed up as 12 months ago, and the energy you had is different from the person showing up today. I feel for you, and know that must carry with it a heap of emotions in itself.
Damn for what its worth I'm sorry about what happened between you and your ex's best mate, and that most of friends chose to believe somethings that were not true - thats really unfair. Was there anyone that stuck by you through this, or new friends that you have made since?
Hey I'm glad you are still working, for me personally this is my biggest relief and time to "check out" and do something productive. It does sound like more downtime is what your looking for though? Is there anything you do no for your own enjoyment?
I'd love to help you in any way possible, and I see you want advice so I'm wondering if there is anything particular you wanted to talk about? otherwise just happy to chat :)