<human>: Yesterday we were out at a friends party and it was fun in the beginning but somehow I was hurt by some things she said before.

At one point I suddenly overreacted after a friend of her and her said again something just to annoy me and I just said "well, you are dead to me" to both of them.

It was the most stupid thing that I could have done but I did.
I tried to apologize but alle she said was "Im not mad at you... Im just disappointed"

I dont want to lose her so please help me.

Give me the gist of the text in a nutshell
<bot>: I said "You are dead to me" to my gf and I dont know how I can explain to her that I didn't mean it.