How to deal with loved ones who don't support you?

I am very close to someone in my family. I have supported her through rough times and offered my advice. However, she does not support me for the one thing I want in life. I am working hard to achieve my goal (career related), but she is completely against it. I have to live with her, and interact with her everyday and I feel her negative vibes around me. It really hurts my feelings. How can I deal with this issue and maintain peace in my mind? Thank you, I appreciate it.