Is it normal i'm shocked he won't leave me?

Well first of all I was always surprised throughout our relationship that he never left me. If a guy isn't happy with someone or anything, he ends it right? So the fact that my bf never really told me "its over" or "he's done" after so many issues and arguments over little things, it really shocks me. I guess he does love me after all. That was before we got serious. Then once we got more official, things were great. I loved how he treated me because he put more effort into showing me he's mine and Im his. But as the time went by, I was getting more worried because I felt like I was living a lie. I felt like we were both wasting our time and trying to make it seem like me and him are meant for each other when really individually we knew that we were not that compatible with each other.

From the very beginning, when we started out as like friends with benefits which was like two years ago, I was always trying to please him by being the girl I thought he wanted. As for him, I noticed he was someone different with others as opposed to me. I always questioned, why me? Why do you choose to be with me? What do I have that makes you want to be around me and more than friends? Don't get me wrong, I love this man. Nobody close to me has ever seen me so committed to a person before. But I guess I felt like he liked me less especially when I saw him around others, he looked more happy. Now its going to be two years that we have been involved with each other and like I said, Im getting worried that time is running out and we can prob find something better because of all these issues. So I told him that I want to break up. He took it harder than I thought. He said he needed time to think this and it was about a week he took his time but he contacted me asking if Im sure about this. I said yes before I thought twice. I know its the most healthiest thing we can do for each other. Finally, we broke up, well I thought, and he contacts me like if he's still my bf and I told him to stop acting like one cause I feel uncomfortable and he's like "but I still feel like Im your bf and I guess Im just in disbelief."

Again, I don't know if Im blind, but I don't get why he chooses me when clearly, he always seems unsatisfied and sometimes he tells me "I wish you were more_____" The old me would conform to what he wants me to be but I guess its part of growing up to not give a fuck anymore about being someone else to please others and I genuinely don't feel like changing for him. Theyre little things but still, it affects us daily. So I would like to know, especially from a guy's perspective, why does he want to be with me on top of me not being everything he wants me to be and us not satisfying each other? At first, it made me feel good to know that he loves me no matter what but now after no progress, I feel worried and tired of trying to become of what "could be." I know he loves me and I love him but after two years, well like a year of being official, and not making progress, I honestly feel like we should take a break and see what else is out there.