Is My Same Sex Friend Flirting With Me?

Her name is Shania and we've been friends for about two years. we'r both in the ninth grade (15 yo) and we only have one period together. i always had this weird feeling that she be flirting with me. sometimes when i walk by her she says hey beautiful and or tries to hold my hand. today when we were changing classes, she said hey mari as if she was talking to her boyfriend, she said slow and sensual which is confusing me becuz a couple of weeks ago she was crying becuz she thought she was pregnant... i am attracted to her (im bi btw) she use to "joke around" and call me her girlfriend but idk anymore, she seems serious now.. is she flirting with me?????