Am I doing something wrong here?

I started working out, eating healthier, I'm trying to cut out eggs and dairy and I'm REALLY focusing on making my freelance dream come true, but then my boyfriend gets randomly very upset today and tells me that I'm changing too much too quickly. Like, it's just an altered diet and working out? And he says that if I keep that up, if I change too much he'll stop loving me because that's not the girl he fell in love with.
Am I doing something wrong here?
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