I guess no one is going to say the obvious, so I'll bite.

Find someone else, make this a top priority. Forget online dating, just go out and try to make connections. Make this a top priority, much like trying to find a new job.

The rest of the people giving you coping mechanisms is just slop. Most people aren't meant to be alone. You sound like one of these people. You're looking for life hacks to deal with something that sounds like it's very much a choice. Do not go gentle into that good night. It's not going to get easier. And God forbid you have some medical issues which we all inevitably do. Who is going to take care of you? Who are you going to spend your last breaths on? Some passive musings to a nurse?