Search Results: reading her signals

I'm new to the dating world and I'm still learning about body language. Please help me, I'm curious. These are all from my high school.

Girl #1 -
1.) Everytime we pass by each other, she keeps eye contact. When she gets close she smiles and says hi.
2.) Called me tall and "nice". But this was after I told her that she had a nice voice.
3.) I accidentally ignored her when she said hi. When we pass by each other, I catch her looking at me but she instantly looks somewhere else.
4.) One time she was with one of her friends. Her friend said hi to me, so I said hi back. The girl said hi and instantly looked somwhere else

Girl #2 -
1.) Everytime we pass by, she stares at me for 3+ seconds
2.) She tries to start conversations, which I kept ignoring / acted disinterested
3.) I'm confused because this girl is around 9/10. Definitely above an 8. I'm a Korean guy, I don't look like a model, but I consider myself pretty attractive, much more attractive than an average Asian guy. However, I felt like this girl was just playing mind games with me for an ego boost because I played hard to get earlier. One time when we were passing by, I gave her a strong "glare" for a good couple seconds and looked away. I was trying to send the message, "why do you keep checking me out? I know you're probably not into me. Stop stringing me along for self esteem". Ever since that happened, she looks at me, then looks away nervously.

I don't know if these girls want me to approach or not. I hear girls saying, "why isn't he getting the signals" all the time, so I don't want to miss the signals. But maybe I'm reading into the signals too much?

Also, what does it mean when a girl that I haven't talked to for a long time stares at me, grins, and smiles?
When a girl that you never talked to approaches you holding eye contact, and hits your arm "accidentally", does she want you to approach?

Immature comments will be ignored. Thanks