Essentially what happened is that my ex withdrawals under stress, and I react anxiously and seek reassurance. We’ve had a lot happen in the last six months (3 deaths, health issues, a job change, etc.) and ultimately because of the health issues he’s been experiencing our sex life became nonexistent and a few months ago he initiated a conversation about finding ways to still make me feel wanted and desired, but the conversation never really went anywhere, I was focusing on trying to feel connected in other ways, and I see now where we both went wrong. A week and a half ago, he spent the night at my house (we live a few hours apart) and in the morning he broke up with me by leaving the keys to my house hidden on the counter and had me walk him outside, kissing me goodbye and acting like it was normal. We had a big blow out over text when I found the keys, he shut down, I panic spiralled, and ultimately decided that we would take a few days to cool down before we spoke.
The other day we met up to exchange some things, and we actually had a good conversation, he opened up more than he had, I left space for him to actually hear me without blurting everything out at once and overwhelming him. And he told me that he is completely burnt out and he’s working on it, that he didn’t entirely want to break up but he felt guilty about not being as invested in the relationship, and for now what he really needs is his best friend, and could we do that for now? There’s no guarantee of us getting back together, but there is hope. I told him that I want him in my life because I do, he’s a great person who handled a tough situation in a shitty way, but he’s a good man. I also told him that it’s going to be hard for me, because I do love him, but that I want to be friends and work on ourselves, and essentially told him that if he is ever ready to try and explore more again that he can tell me, but I’m going to work on myself and that I’m not going to wait, and he said good, he doesn’t want me to.
How do I address the elephant in the room about if/when one of us is ready to start dating, but decides to look elsewhere? The thought of being best friends with him and then not knowing until he’s actively looking to meet someone else is causing a lot of anxiety for me and I don’t want that to be a problem in our friendship.
You need to go forward with this friendship assuming that he's already ready to start dating and looking elsewhere. I would encourage you to take space until you can accept that. Maybe one day you can be friends, but that doesn't mean you have to be ready right this instant.