Hey rnnr,
sorry to read about your slip and your rough times. But good to see, that you are back on track again! Your previous progress is definitely not lost. I've been following your journal from the beginning and its been - and still is (!) - an inspiration for me as well. I can relate to quite some things here.
I too had a few very bad days around the 1 month mark. And I know your situation of being self-employed and its pitfalls (danger of working at home, a lot responsibility, making your own schedule and sticking to it without too much procrastination, not enough social interaction at times...). I too have been on the edge of a nervous breakdown a few times, when I had huge projects ahead. And PMOed instead of taken care of it, making it even more stressful. Time in nature and meditation helped me to calm down in those times.
Last but not least, your situation with women - how you seek their approval too much - rings a bell as well...
But the way you reflect on your progress as well as on your setbacks tells me, that you're bound to succeed. All of your five points make a lot of sense. However, I wanted to add that point 3 sounds very ambitious! If you are working out all day and pressuring yourself permanently to also spend your evenings with friends all the time, this might get very exhausting in the long run I guess. When I have a week with very much social activity, I usually absolutely need some time for myself as well. Some chilling at home. So I think it might be important to find a way to spend time at home while still feeling save from PMO.
Another thing I thought a lot about for the last 2 days was your closing comment "I can choose to feel happy every day". In the past, I used to beat myself up a lot for not being as happy as I should be. Because I always had a roof over my head, a caring family and great friends. I neither can't complain about my intelligence nor about my looks. Still, when I tried to tell myself to simply be happier because of what I have, it never worked. For me, the conclusion seems to be, that I actually don't have control about how I feel. But I do have control about what I do. So when I feel good or bad, I can try to find out what led to this emotions and act accordingly in the future. Which is, as I see it, very different from trying to influence my emotions directly by saying to myself "I will be happy today". And I think, that everyone inevitably has some very bad days from time to time. You can't have the good without the bad. Accepting bad days and bad emotions, while trying to do things that might make me better helps me to get through this days and to not take my own bad feelings to serious. Basically, that's just the opposite from what Jason just said and I definitely don't wan't to say, I'm right and he's wrong!
Actually I have no idea. It's just something I am thinking about myself and trying to figure it out.
Here's also a kind of "self-help" article about how to deal with ones emotions that I found interesting:
https://markmanson.net/fuck-your-feelings
And by the way, congrats to your impressing pace of 4:51 m/km. I'm struggling to get closer to the 5 min mark for quite some time...