very shy and dates scare me

i (25,f) have never been on a proper date before, whenever the opportunity arises i usually turn it down because it seems so nerve-wracking. i feel like i would be too nervous and wouldn’t enjoy myself. i’m afraid i’m holding myself back but i can’t shake that feeling of panic whenever someone asks me out. someone i’ve been talking for a couple weeks asked me out to see a movie and my immediate reaction is to reject it, but im afraid i’ll regret doing that. although i don’t have the strongest feelings for this person, if i don’t take that next step i’ll never know what it could lead to. i’ve never had a series relationship in my adult life and i think it’s because i usually end up liking people im already friends with, since it seems easier than getting to know someone new for the sole purpose of pursuing a relationship. i don’t know why that approach is so anxiety inducing to me, i know im a shy person but i didn’t think it was this bad. any advice to overcome this