Boyfriend hates when I dye my hair. what should I do?

since I was 14 I love dying my hair, now I'm 22 and have this problem with my boyfriend that he hates when I dye my hair in fantasy colors. How do I make him understand that I will always dye my hair no matter what he thinks or says. That's how he met me so I don't understand what's the problem now. The colors I use are only blue or pink if not I have the blonde hair for a while until I decide to dye it again.( I have Naturally dark hair). Sometimes I feel like he wants me to look a certain way, I feel he wants to change me. but I don't know if I'm just overthinking it. What do you guys think?
Boyfriend hates when I dye my hair. what should I do?
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