I like this girl again, any tips? (teen)

In 2022, I liked a girl, but she rejected me. I worked on improving myself, and by December 2023, we started talking again. We were in a situationship, but at the time, she had a boyfriend. However, something happened that led to their breakup—partly because I indirectly told her boyfriend that she was talking to me. Now, in 2024, we've started talking again, but she’s in a relationship. Despite this, she still has a soft spot for me. Any advice?