Anything will make her happy, I promise. But if you want it to be extra “meaningful” or special, maybe something that throws her back to when you first asked her out like the meal you shared on your first date or something. Or her favorite animal, stuffed. Or some flowers. Tbh just slap a bow on yourself and call it a day. A girl who loves you literally won’t care because you’re the ultimate gift. Don’t stress about it.