I (28F) have been seeing this guy (27M) for about one month now. Due to personal reasons I tried to detach by telling him before we even met that I'm emotionally unavailable and could only be casual. I gave him a lot of disclaimers and numerous opportunities to say no, but he was perfectly agreeable although he told me if that's the case then he might still talk to other people, and I said yes of course. I had never tried being strictly fwb without any possibility of being open to a relationship before but figured maybe I should give it a go. For context, I also don't like to see multiple guys at once even when I'm in a casual stage, so for this reason I was only seeing him and no one else. During the first week, we met each other three times. And then by the fourth time we met each other, the weekend following that, I started realizing I'm not capable of being detached and that I'm at my core someone who still wants to date and be open to a relationship, and that I was liking the time we spent together in more than a strictly fwb manner. We talked every single day and were very honest and upfront w each other the entire time, which maybe is how I had a change of heart. So I met up with him saying I wanted to talk about us, and I told him how I can't do the only casual thing anymore. I said I understand if he wants to still figure things out with the people he already had met and I would be fine with that, but I told him I personally would be uncomfortable if he was interested in still making a bunch of NEW connections, and if that's what he wanted to do that I would be out. I told him that someone who's constantly searching for new girls instead of trying to work on existing connections is someone who would have a different mindset from me, and I wouldn't be interested in seeing him if so. He told me he still wanted to see me but he would need time to make this switch in his brain from me being only fwb to properly dating, but we agreed he wouldn't be someone constantly searching for new connections.

The day after we had this conversation, I noticed that he had swapped instagrams with two new girls (I have chronological following on my insta so I could see). To me, this annoyed me because I saw it as, even if he was talking to these girls before our conversation, he still swapped socials with them having not met them yet ie. they're a new connection. I felt like he wasn't taking our conversation seriously. So I sent him a voice note saying I notice things and that if you're still interested in swapping new socials I told you I'd be out. He was pretty upset and said that he can't suddenly stop talking to ppl he was talking to just because I suddenly decided I didn't wanna be casual anymore. I talked to a friend about what happened and she personally thought I shouldn't have lashed out like that after only giving him one day. I guess I could've given him more time.

I just don't know AITA for being mad?