I can't stop checking this girl out
Why are you checking her out so much?
I'm not obsessed with her, I'm just interested in her. I see her everyday.
It's not okay to obsessively check someone out, they may not like seeing someone do that. You may make them feel uncomfortable.
It's fine, I won't get caught.
I just think it's bad to be obsessed with someone to the point where you're constantly checking them out. You should try to not think about her this much anymore.