Why am i such an A hole?

idk why i do this but i've started finding lots of things that get on my nerves about my girlfriend, idk why i do this but i'll just find something small like her doing other things while shes on the phone with me or not calling me first or other stupid thing and not yell at her but just kinda tell her that i dont like it and jsut keep on it untill i get a response from her i cant stand that i do this and i need it to stop i love this girl to much to act like this thanks for any help