Please help me!

Jasmine • I love who I am
So I have this problem I've been trying to deal with for months now and I don't know what to do. So I've been dating my boyfriend for the past 10 months now and we are almost just about to hit a year. And my best friend who I love like a sister doesn't like him and this is boyfriend is always working and constantly busy but he still makes time for me and him to talk. I know how busy he is but my bestfriend doesn't quite understand it. She's says that " he's not right for me or I could do better than him." But I love his big head ass a lot. And the reason why he works so much because he wants to take me out and spoil me every once in a blue moon. Plus, he's trying to buy he's own apartment because right now he lives with his older brother and his family. What should I do about my bestfriend? Tell her to fuck off? Or what because I'm out of answers.