Now I've met someone that is serious. I'm panicking. Is this normal?

I think for a long time because I never got the things I truly needed or wanted. I learned to talk the talk and not believe it. Every disappointment just came along to reiterate that I wasn't quite good enough or I just wasn't destined for that path.
But now I've met someone who's trying to make it seem like all of these things could actually be a reality, I'm panicking and waiting for the penny to drop.
It's suddenly made me realise that I haven't really thought any of these things through. Not really in the context of me. And it's making me really vulnerable...
I feel really unsure of myself.
It's a strange thing to think this but worse to say it out loud. "there was comfort in knowing my life was just made up of constant disappointments."
Is there something I should be doing or asking from him?
Now I've met someone that is serious. I'm panicking. Is this normal?
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