Broke up with my bf of one year

we were childhood friends he liked me first and than i started liking him too. we had lots of ups and downs regarding us and our parents but we still got together and started dating but i always found myself being misunderstood with him and i really tried to make him understand me but it never worked, we had same arguments again and again, he said he would change that now he knows better but the cycle continued and i got kinda fed up with it so i broke up with him...

but idk why now i feel like such cruel person like i did something wrong, ik what i want in a person he isn't that and no matter what i can't make him do what i feel is right but idk why i feel like such a evil person...