OK SO

I wrote a text post (here) last year about how I connected with a woman (she is 25, I'm 22) who lived just next to where I work.

The update you were all waiting for : yes, she was very interested in me, yes, we went out together on a date two weeks later (she complimented me a lot during dinner, whereas I was too mesmerised to say anything – though I managed to keep my cool). Surprisingly, she seemed still interested in me and we slept together afterwards.
We spent a lot of time together this summer, and despite this crazy year, she always took time to talk to me, or she asked me out for (COVID-friendly) dates and stuff. Or she would wait for the end of my shift to see me.
She's my girlfriend now ! I'm so happy with her, I love how sweet and thoughtful and quirky she is.

The tricky part : she is beautiful. Like, I'm not saying this lightly. So much that her part-time job is being a literal model (runway, clothing, advertisement, lingerie, you name it) and she's absolutely killing it. People always comment on how vibrant she is, she gets free stuff constantly, a lot of her friends are models too and she has no problem being asked out by men and women alike.
Honestly, I don't know how to navigate this, I don't know what she finds in me ! I'm really average (looks wise but also mentally/emotionally wise) and she's absolutely awesome, likable, and attractive. I feel really insecure, she could find so much better than me. I don't believe in "leagues", usually I'm a pretty secure person but like... this is too much this time...

Please fellow people, have you ever been in this situation ? Tell me your story and chime in with your wisdom please, I'm feeling so inadequate right now