i hate mysekf bc of you

I'm with the guy and well he's 4 years older then me, and I hate how miserable I am when I'm with him but yet there's still party of me who loves him. I honestly wanna end our relationship bc I feel like I've out grown it. and not to mention I feel like he's holding me back from having a successful life. bc I take care of both of us I pay for everything and I'm killing myself to do it. I go without so he can have and I'm not happy anymore. someone please give me advice.