First actual established relationship, Should I break up?

I'm the kind of guy who always had difficulty getting into relationships, eventually this put me in a very rough place, depression, low self esteem, seperation anxiety.

Long story short, I ended up asking this girl out, I was so blinded by my emotions that I didn't stop to think about my preferences, turn offs, etc.

Big incompability issues aside she says things like "I don't think I would be able to take it if we broke up"...

It just makes me feel like an asshole, she pulled me out of my depressive state, which I'm eternally grateful for, and now that I see things clearly I want to break up... Did I just use her?

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Update: We broke up, I would like to thank those who shared their knowledge, it truly helped me gather the bravery to do so.

I will spend this time to focus on myself
First actual established relationship, Should I break up?
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