give each other space to calm down. She need to think about the future of the relationship, so do you.

If u really love her and want her to be your life partner, then u should put more effort. I used to have fight with my girlfren. Later we both realize it is important to give space and understand each other. One thing i am damn sure is even if u win the argument u will feel bad, because while u win u are hurting her. I learn to give in when both of us is angry, not because i am wrong, but because i love my girl. I will talk things over when we both are cool. That time she can accept correction more willingly.

Good luck!