i'm scared i may be giving up.

when i used to argue or fight with my SO, the passion and the fire was always there. i was willing to stand my corner, fight for my opinion, stand up for myselff. i wanted to show her at that i cared about was going on and her opinion of me and things i do.

i used to be that way but tonight, tonight was different. i lost my willingness to argue, i lost my fight. i just did not care, i just wanted it to be over and i am so scared that this is a bad sign. she is my first serious girlfriend and long term partner.

what happens when you lose that fight? is that normal? i'm terrified this is a sign of my emotional/mental self telling me i have given up.