How do I 25M approach my ex 23F about our breakup?

So me and my ex recently started seeing each other again. We were together three months and things seemed to move pretty fast. We ended up breaking up because I was struggling with mental health issues like self-esteem, insecurity and depression and was unfairly lashing out at her.

I’ve been going to therapy since then and truly have never felt more confident and secure in myself than I do now tho it is still a work in progress of course. I reached out to my ex about a month after no contact asking to grab drinks and she never responded. I moved on and stated seeing other people when about three weeks later she reaches out to me saying she’s ready and wanted to grab those drinks.

We go on our date and hit it off instantly once again and I spent the night at her place. We met up again this Friday know just spent the entire weekend Fri-Sun together. Last night while drunk and making out she asked me to stop doing that and staring at her.

When I asked why she said because it’s causing me to develop feelings and idk if I’m ready. She then started crying. I assured everything was okay and we’ll have a conversation about everything when we’re ready. I offered to have it then but she said she wanted to wait for now. She excused herself to the bathroom to clean up and we hung out the rest of the night.

We’ve been seeing each other again for only a little over a week but I’ve already spent three nights at her place and we’ve spent entire days together now at this point. I’m not sure how or when to approach the conversation about our breakup but I want to make sure that what we’re doing is healthy for both of us.

TLDR: My ex and I started dating again, she started crying and saying she’s developing feelings when she doesn’t know if she’s ready last night. Im unsure when/how we have the conversation about the breakup.