I want to breakup because he is hot and smart?

i dated this guy for almost 4 years, and we are in the same uni, medical course. it has been rough since the beginning but i have forgiven him and want to start things anew since a year ago. it's just that things get even worse about him being smart. he is a 3.9 student and we are talking about medical school, not just some random uni, u can tell how smart he is, he is so popular bcz he is smart, friendly, nice n all. i love him so much but i cant take it that juniors (mostly girls) ask him for free tutorial, call him for guidance n stuffs, i know it is academic stuffs, and he is honest and when i tell him i feel uncomfortable, he say he just want to help them.i hate that those girls come and want to treat him for teaching them and as if he is so everything but i am nothing!. i maybe jealous, but i am jealous because i feel like i get the same thing like other girls, he teach me the way he teach them. and even worse is that people look at him as the 'smart guy' but me as the 'smart's guy gf' and that's it. people keep telling me he is this n that but nobody talk about me that way, it seems like people always see what's good about him, but they see nothing in me. when i tell him this, he just say as long as he knows i am nice (i cook, clean and do stuffs for him). but i don't want that because everybody can see and adore what's great about him, but HE is the only one who sees what's great about me, and others think i am a plain girl who is sucking up to him. i hate this feeling, i thought it will go away after few years, but it doesn't.