Is it normal to not like someone for no reason?
Yep.Totally normal
Yes. You can dislike someone without being able to name a clear reason; sometimes it’s just a mismatch in personality or an instinctive reaction.
You don’t have to click with everyone. A tone of voice, mannerism, or general vibe can put you off before you’ve figured out why—and sometimes there really isn’t a neat explanation.
The feeling itself doesn’t make you a bad person, and you don’t have to force a friendship. What matters is how you treat them: you can keep things polite and fair without pretending you’re close.