Help me on what to wear 😭

I haven’t been shopping in a while and it’s too late to go, and my bf invited me to a party that his friend invited him to. Buttttt I have no clue what to wear. It’s a quinceañera so that means fancy...but I only have super sparkly dresses and I don’t know if it’s worth wearing one of them to a party where I don’t know anyone. It’s not even my bfs family either.. Like why am i going to go all out buttt if I wear pants and a cute crop top I’m going to feel super underdressed still 😭😰

Here are my dresses

This last one is short but I was holding up the little sleeve. What do I wear?? I also have some cute crop tops but I don’t know if I want to wear pants. Please help cause my mom and sister are working and I don’t have girl friends 😭😰