Go chase her.. don't give up on her. She's already flirting to you, so its mean she has a feeling for you..maybe she talk to other guys because she want to make you jealous to make sure whether you really like her or are you really serious after her.. just go chase her!!!
I'm a guy in high school and my crush and I have been flirting. Today I saw her talking with some other guy after school and it looked like she had feelings for him more than me. What should I do? Focus on myself and my friends or should I chase her?