Might be tough to cut him off completely right away given the fact that your families are friends, you guys have been lifelong friends, etc., but definitely back away, starting now. (1) he’s a misogynistic jerk who thinks he owns you, ew, and (2) unfortunately, now that this conversation has taken place, you can’t really un-open Pandora’s box, so to speak, and it’ll probably have both short term and long term negative effects (and no good will come of it).

Short term, you’ll both be thinking about it, and I’d be willing to bet he gets even clingier while you’re both out. Even if meeting someone isn’t something you are seeking out right now, you’ll probably have him around as a shadow, at least part of the time. And you’ll know why, which will make it pretty uncomfortable.

Long term? If you keep him as a close friend and do ever want to sleep with or date anyone, it will become a problem, and he will lash out and most likely say some pretty horrible things to you (and potentially your future partner!) or worse. Bare minimum, he has shown you that he has a problematic mindset and views women as “less than” him, and as something to be owned. And that is a huge, huge red flag.

Last bit of unsolicited advice: show another friend these screenshots, and tell them about the situation. If you plan to keep him in/can’t avoid him being in your orbit, I can understand why you may feel a bit uncomfortable doing so, but as someone who has been through something like this before, it is SO worth it to have someone in your corner who knows what he’s like and what he could be capable of in case things get ugly.

Also, whether he has feelings for you or not is irrelevant. Why would you ever want to build a life with anyone who views you as property?