You said it yourself; you had sex with a BOY. A boy who obviously doesn't have enough sexual experience to know what normal vulvas look like (or to know the difference between a vulva and a vagina). Not only that, you KNOW he's a jerk because of the way he's behaving, and you want to take his word about the beauty of your vulva?
Sounds like he was expecting to see the vulva of a child or the ones he's used to seeing in porn movies. Was he a virgin? Normal adult women have labias that come in all shapes and sizes, including "beef curtains" (why not think of them as petals instead?), real men know this (and I bet many would love to shake some sense into that little rat you had sex with), some even prefer vulvas like yours.
No comments from me about self-love. Just saying it sounds like you have a perfectly normal vulva. If you want to change the look of it, then by all means go ahead, it's your body, but save up the money for it yourself. This should also give you some time to think the whole thing through one more time, so that you're 100% sure you're doing this for yourself, and not letting some immature jerk dictate the look of your body.