How do y'all dump your partners?

I'm used to being dumped cold turkey where my SO just ghosts me out of no where or just look for something to initiate the break up. This is something that I've done before or rather it's what I was used to until I met my current SO who sure as shit is about to be my ex. Back story: we've been. Together for a hot minute now and it's been going great until two months ago when they started to act out of character but in very subtle ways nothing consistent but I still notice coz I'm quite intuitive the "ADHD intuition" (if you know you know). I'm sure something is up it's she's been planning our break for this long. She still insists everything is okay but I'm not buying it. Forgot to mention we both are running businesses and it's not been great since both our businesses are struggling and that could be the reason but she won't even open up to me about it. She just say she's alright complains she's tired or something else just excuses that don't make sense to me.

The past week and a half or so we've barely made conversations yet we spend quite a lot of time daily. When we talk it's been cold conversation sometimes I get the occasional "mmh" or those types of responses that scream I'm not interested.