Is it right to change yourself for a relationship?

Depending on what the changes are. They shouldn't change your entire character but some level of compromise must be there from both sides in order for you too to meet halfway and be happy. You cant just say this is how I am if for example they want you to do something a bit different than how you are because then you're just being lazy and not putting in any effort for your partner. But if they wanna change every single thing about you and they're never happy with you or your core values then thats not healthy.