What do i do?

Last night i called my gf, and i was talking to her, and asking her about work, then she said "i would be back" so i waited 2 min gone by, and she wasnt back, so i hung up the phone, and called her back. she didnt pick up the phone, so i knew her friend was with her. so i called her friend and asked to talk with my gf, and she gave me the phone. i told my gf, to pick up the phone, because i was going to call her back. i called her back, and she picked up the phone, so then i was asking her how work was, and everything, and said "good" and thats it, i asked her if she saw her friend nisrin, and she said yes, so i was like... how is she doing... and she said "i dont know, i didnt talk with her" so i asked why she said "she isnt my friend" so i was like okay sure, then i was asking who was at the party with her, she said co workers, so i was like cool, you gonna have fun, so nisrin is there? and she said "i told you, she isnt my friend" i was like, please chill, im not fighting here, i just thought co-workiers and she would be there... and somehow my gf said " i dont have a life" i thought that she meant because of work, because her work is an internship for school ... i told her not worry that soon, the interneship would be over, and she would have lots of time with her friends... the all of a sudden her tone of voice changed, and she got upset, i was like "babe, wats wrong... talk to me, im here for you" and she said nothing ... i was like cmon what do u want me to say ... she said "wat ever u want" i was like, im not fighting her... wats wrong tell me, she said "i would talk with you tomoro" i was like, okay, but give me a hint, so i wouldnt be worried ... and she said "Think" so i was like " u cant tell me straight you would talk 2moro, and then say think" she was like, "yeah i can so listen up > I WILL TALK WITH YOU TOMORO" and she hung up the phone....

so i called her back, she didnt pick up, i called her friend, her friend lied and said she was talkin on the phone, i called my gf back, she picked up the phone and said "i dont want to talk with you, stop calling" and that was it... i didnt hear from her since last night... i called her in the morning today, but she didnt pick up...

im lost, i dont know what is going on, i dont know what happened! and i dont know wat to do... please i need your advice

I think she needs sometime!!
wait 4 a few days and IF she didnt call bak..call her and ask wats wrong just to be sure she's alright..but i think she needs sometime and she'll call u bak!

and i think u did something that u dunt know..so THINK..as she told u..wat hav u done?!
maybe it was something u(guys) thought was cool while she(gurlz) thinks totaly the opposite..

Thanks everyone for the help... means alot to me!!!

It comes across like you're drilling a person when you ask constant questions like that, even when you are just trying to show that you care. It's overwhelming. So I agree with whoever said to leave her alone for the time being.

I agree with Angelina

"so i called her back, she didnt pick up, i called her friend, her friend lied and said she was talkin on the phone, i called my gf back, she picked up the phone and said "i dont want to talk with you, stop calling"

And this is just a little obsessive, you push until she hangs up and then you push more. Chill and stop freaking out.