How can I fix this. I fucked up and I feel like I'm being gas lit?

So I found out that this girl I was interested in was married and I confronted her about it and she told me it wasn't true that she was single. I was approached again a while later with the same information but this time I called one of her friends who obviously told her and she was not happy what I called her friend. She still denied being married but at this point all I wanna be is friends. Her friendship means more to me than dating. It hurts not talking to her everyday more than knowing we could never be together. I've tried to apologize but in the heat of the moment it wasn't received well. How can I fix this. She loves plants and her favorite color is blue so I thought about getting her blue hydrangea as it matches closest to her favorite color and buying her friend flowers as well to apologize for calling and over stepping my bounds. What should I do.
How can I fix this. I fucked up and I feel like I'm being gas lit?
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