She lied to me about her age am I a bad person for believing her and hanging out with her?

So I met this girl at the bar drinking, we ended up talking a bit and hanging out. We did not have sex but when we were hanging together she told me she wasn’t really 21 she was 18 and used a fake ID to get into bars. I’m 24 and I know 18 is still legal but it grosses me out I’ve told my friends about it just venting and they ignored my message. It makes me feel like shit even though I didn’t even kiss her because she’s so young now I don't know what to do I’m not hanging out with her again.

She lied to me about her age am I a bad person for believing her and hanging out with her?
Post Opinion