How to approach co worker who I developed feelings for?

This co worker helped me through my toxic ex and after that I started liking her but I’m pretty sure she sees me as a kid. I’m 21 and she’s 24 almost 25 so there’s an age difference there and she’s older than me. I just wish she wouldn’t see me as a kid. How do I go about this.
How to approach co worker who I developed feelings for?
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