I thought if I was the coolest, most supportive and most awesome girlfriend he would see and "realize" he wanted me and only me.

Totally backfired.

He couldn't believe how much I was willing to humiliate myself in order to keep him. He lost all respect for me and treated me like I was no one important.

Yeah, he "apologized" too, yet he kept treating me the same. How could he respect me when I acted like I didn't respect myself?