I really like this girl who I kinda know, I'll look for eye contact and sometimes she looks at me, others not really. Is it a coincidence or does she like me?

If she's shy then maybe she's trying not to be so obvious about her crush on you. Or she just wants to get to know you better.

Don't just ask people online! Ask her, or if you "can't" then just talk to her and look for signs of nervousness.

She probably likes you.

She probably does like you but she is playing hard to get which can be frustrating for the guy.