My gf insulted me 1st time coz of her failure in exam.we love each other.M going to suicide..HELP me if u can.?

My gf said to me that she dont want to talk with me and she want to live alone.she is just insulted me.she replied that plz dont eat my brain.this is my 1st love.we are in long dist rship. All girls are like that??i mean they want to live alone in problem.i m not going to say sorry to her coz she just want to live alone and she dont want to do message to me...she dont like if i carring her much.she dont like if i force her for chat. Guyzz i hurted very much and she switched off her mobile.she is insulted me coz of her xam failure in 1subject. she is 1year older than me.My gf will leave me?and she will remember me if she get married?i mean i really love her.she accepted me abt 5months ago.bt nw she is totally changed. girls think abt their mistakes and 1st love???i m very depressed......m going to suicide.