Is this a red flag?

I know a guy who is sure he wants to go out with me. I knew he liked me for months because of his constant staring before we even met each other. When I asked him what does he see in me he says from his observance we are both the same, I stay to myself and I'm very quiet like him. Introvert I'm assuming? We went on a date and he doesn't see anything wrong with me and is sure he wants to go out with me. I don't even remember telling him much about myself but he is also friends with a guy I used to see.

Is this a red flag?
Post Opinion