A positive attitude towards sex will define your vagina as beautiful, however you choose to present it. If you have a partner that wants you to change yourself, then it's time to change partners. Or at least your partner's attitude. The fault is not with you.
(And men, the same goes for the look and / or size of your penis. You, too, are perfect the way you are, and should demand that your partners love you and love your penis exactly as it is. Please ignore the constant barrage of suggestions that you should be any different to how you are).