Browsed the website, unt attractive to me but I know dudes who would thrive in that environment, so maybe you would as well. I prefer less structure myself.
I would go nuts if not for hobbies/interests. Fishing & Fly fishing (and tying) Woodworking (full shop, I can make very good quality furniture, etc..) Metal working shop (I can make parts, tools, etc...) Model ship building (good for winter). Love to cook Love to drink even more Love to read Just find something that interests you. I don't think you're lonely, I think you are bored/boderline burned out.
I thought he said he was married and he has kids. So, if that is true, your final verdict is a terrible idea. It could destroy his marriage, his wife and his kids. Too many people are doing that already. I call them idiots.
Personal and professional lives are usually connected with each other. If there’s something wrong in your personal life, you’ll eventually carry it over in your trading and if you are only surrounded with trading thoughts then it will impact your personal life. Having a right balance is very important. Spend time with your family and friends or doing something that you love doing.
Many people feel lonely even when they are around people. Try visiting a Psychotherapist and talking about your problem, it may help you.
Big update: I have taken all of your advice and am seeing immediate effects: I am now travelling at least 1 week per month to go skiing and am feeling great! On the other hand, my returns have suffered a bit - I am running short of good ideas. I guess I need to find the right balance....