I left him but i really want him back! Will Best Answer!?

Here it is. We have went out a couple times for long periods of time. But theres this other girl, his ex, i seriously thought she was going to kill me so i broke up with him. I realize i made a huge mistake and i want him back. i asked him back out and he said he really likes me but he doesnt want a relationship. i think about him 24/7 what should i do!!!:(