Should I break up with my girlfriend?

Should I break up with my Girlfriend? (Like my other posts, This is a really long text because I'd like the most accurate answers possible, so I'll space it out for the sake of your eyes.) Seriously, this is really long, so don't waste your time if you won't read it!! 💝 /gen /srs For context, We've been together since 2021 around February and have been on and off, but not as frequently as the times have gone on. For the most part, We're both pretty mentally unwell and the thing is, the only thing keeping us together is the lack of communication. From the start, we both thought that we wouldn't work out and that this would just be temporary, but we both wanted it to work. We haven't fought at all, ever, just may be some emotional conversations, but never have we ever argued or done anything to the point where we felt the need to break up. She's done some pretty unnecessary things in the past but she admits to only wanting a reaction out of me around an hour later and I've always been understanding because I know how it feels to want to push someone to the edge to get them to admit something to you out of frustration, but I've always been better at controlling it and I always think twice before replying to her texts because I never want to trigger her, and I can tell she does the same. I really do love her and just Not knowing how I'm feeling or doing mentally most of the time and not being able to tell her may be frustrating, but I think it's best that I don't. I love her very much but the thing is, This past one or two months I felt myself getting better. I completely became obsessed with improvement. I've cleaned my depression room AND deep cleaned my closet, I started listening to more upbeat music (While of course listening to the songs I used to, they're too good.) And I go for morning and evening walks. I also have been improving my art by doing art studies and I've started learning a new language. It's just that, Since I've showed my improvement, I had her over at my house for my birthday a couple days ago and she started a conversation about Fluffy steering wheels. I said I didn't like them, talking about how your hands could get sweaty or sticky while you're driving and it was too much sensory for me. Surprised at my input, she asked why I was thinking about steering wheels if I didn't have a car yet. In response, I told her that once I graduated, My parents would but me my very own car no matter what profession I chose or path I took, as long as I made it to graduation. Now, she's upset, looking at me oddly. She tells me that she hasn't thought about her future at all, but instead of understanding that I've been getting better and are excited about my future and wanting to discuss it with me, she sits down and glares at me from my bed. I thought about it for a second as I was wiping down my desk and the room was silent and I realized how much I've improved, while leaving her behind in her depression. Since she left, I couldn't stop thinking about how it's either I leave her behind or she will hold me back. I don't want either of these things to happen as I want to spend the rest of my life with her, however long that is, and I want her to improve with me. But I know that won't happen easily because the internet is a horrible place for people with mental illnesses, always normalizing and romanticizing it, and I know she's found comfort in her depression because she's posted about it and liked posts about it. I really don't know what to do, it feels like I'm losing her because I'm getting better.