Apart from what Hannibal already said, maybe it's not connected to being single, and it's deeper, or maybe it's amplified by being single. The other case, I think Hannibal explained it well.
I'm really bad in terms of understanding relationships, so yeah I'm really sorry that I can't provide a better answer. You seem to know Hannibal way better than you know me, and it seems like it's going pretty well, so I'll let you too.
I know I'm not really a great mod, but if you wanna talk I'll help you with the best I can !
Take care ✨️:D✨️