Any way to become appreciative and show it?

I was dating this guy for 6 months. We were really great together and he is a nice guy. We ended up fighting quite a lot and he just tired of it, and ended it. I was supposed to be moving to another state but that ended up not occurring as of last night. I said many times I could change because I turned around and became someone I was not, he doesnt believe I can change and I truly want to. He said next year I might have a chance now, it was a for sure thing but lately we just fight constantly whenever we talk. Every thing I do makes him mad now and I want to just find a way to solve this all. I really still care and understand. I just called and left a message stating hey.. I know we had our fight/misunderstanding earlier this morning but I just wanted to say.. and I hestitated to say anything and then said.. well I just thought itd be cool to call you and I hope your having a good day. : ) I sounded happy and all. I broke the rules of my house and didnt care, so thats why things got weird on me. He said he doesnt want me to leave but thought it would be a good thing for me, and that my friends arent exactly good. I know he cares out of his heart but Im frustrating and want to fix this. Can you help me?