I Feel Like I'm Never Enough

I'm gonna start off by saying, I'm no angel. I'm not perfect. When I do something, something else is usually forgotten. I know. But I try. And my 100% isn't always everyone else's 100%. In other words, my boyfriends 100. He's consistently comparing me to his sisters (both older), and saying how I should make their life easier by helping them and instead I do the opposite. If I ever go out with my Dad for driving practice, instead of asking how my driving went, the only question he'll ask is how his sisters were the entire day. Sometimes, it gets to the point where I'm just frustrated of feeling like ignored leftovers that I just cry. And if he ever, which has been just once, sees me crying, he won't understand why I'm crying. 
I love him. I do. But his life just revolves around his sisters so much, I don't think Im emotianlly handling this. 
Am I overreacting? Or do I have a right to feeling this way?