How do you avoid thinking you are not good enough?

When someone very interesting, intelligent, handsome, successful asks you out, how do you not get freaked out?

I used to always reject them in the past, because I always thought it would not work out and they would not like me in the end.

I remember once there was a man at a birthday party who liked me and had been asking me out for a month or two and I always refused meeting him because I was wondering maybe he liked me mistakenly 🥹😄

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Last month, I had a date with a very handsome man, I felt so nervous, didn’t sleep the night before date, but it ended up going well and he ended up liking me and I had to be the one who had to cut things because I didn’t feel that much connection. I thought it would help me overcome my dating anxiety.

Now though, this one is very handsome, very successful, renowned in his field and I am very nervous.
How do you avoid thinking you are not good enough?
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