Please help me

What's something I can say to my ex bf for him to give me a second chance , we broke up because dumb arguments & stuff like that but I promise that I'm going to change my attitude & do whatever it takes to make him happy , it's not all my fault , but he makes it seem like I was so wrong & he can't get back with me. I really love him & he is my first EVERYTHING I don't wanna lose him now. I want him to see that I'm not gonna let my attitude get in the way but he also needs to change too. We were together for almost a year & we had to many plans, when we first meet we had both just moved into town & we didn't have jobs & we lived with other people but as time passed we both got jobs , we got a car & our own apartment , it felt so good , but then trust issues came about & arguing & fighting but I want to change all that and start fresh cause I really do love him & I don't wanna be with anyone else but him.