Well, I haven't been an AN user for too long (I really only started getting into it when I posted maths exams solutions), I'm not a regular, and I only really know some of you from the meetup, so I hope I'm not 'stepping over the line' by giving advice given I hardly know you.
Firstly, @poet, I think it's amazing that you're sharing your experience with us. It really takes a lot of courage both to put your story out there and to seek help / tackle the problem. Though I cannot relate to the food thing, I can relate to the consequences of partially 'neglecting' things that are important in life, either intentionally or not intentionally. I for one, even after 5-6 years of successfully managing my 'issues', struggle to muster up the courage to tell people, including some close friends. Everyone has their quirks, problems, etc., but not many try to act on them, and I really admire that you're putting in effort to doing so.
Here's some context about me. (I'll only provide enough info so that you can understand where I'm coming from. I'm not sure I'm quite ready to explain everything here, but anyway). My 'problem' revolved around a few obsessions I had as a result of a nightmare I had when I was younger, mainly, I felt the need to ensure that people knew the truth about anything - even if the truth would hurt. As a result, my personality changed. I could be a real jerk at times, and I just stopped doing things I loved like playing soccer with certain friends (fortunately, music stayed in my life). I turned everyday tasks and everyday interactions with people into mechanical problems. I have no idea why, but I think it was because I felt more comfortable dealing with them that way. I lost a few good friends then because I decided to push them away (pushing them away being my solution to some problems). (I mean, I could attribute losing some friends to moving schools at the end of Year 5, but deep down I know I was a real jerk to
certain people). Moving schools actually was slightly a relief though. It was a chance to start on a 'fresh slate', tackle any problems I had (I had more than 1), and make some friends that I would keep throughout high school and beyond (and we're still friends today and all at the same uni (UoM)!).
That doesn't mean my 'old self' doesn't cause any problems anymore. In fact, it became quite an issue during term 2 of Year 12 (I made my specialist maths teacher cry), but I've largely been able to manage it, and that's the important part. So, I'm happy to share some ideas and things I did.
1) Everytime I had obsessive thoughts or the need to do something, regardless of whether I carried out the task or not, I would write it down. Eg: "22:00 - couldn't sleep because I couldn't help but try to brainstorm ways to make progress in solving the world's problems". I think writing into a journal or diary of some sort is good because you can keep track of your progress and it forces you to think, even subconsciously, about ways you could possibly recognise the problem before they arise in the future. I think you would benefit from, at the end of each day, writing down the day's events and what you ate (if anything), around those events. You should be able to find a pattern on when you don't eat. In a weird way, this technique worked for me twice as well, because I obsessed over solving logical problems, and so I used my gift of affinity for numbers, patterns and logic to my advantage to try and solve my own problems. (See, normally I would go out of my way to explain that paradox, but I'll let you guys sort that out
).
2) Try to associate things you like doing such as art (I listened to the podcast lol) with eating. There are a few ways to go about this. One way is to, before going about your hobbies, have something to eat beforehand, and to restrict yourself from, say, drawing/painting until you have had something to eat. Eventually the goal is to create good habits alongside things you already love doing so that eating can become something of the same nature. (If someone could explain the psychology behind that, that'd be cool). For me, I found tranquility in mathematics (no surprises there lol).
Anyway, I hope these help, and, as @mini said, no one is here to judge