Mexican but wearing a Lehnga to prom?

Alexandra
So I'm full mexican and my boyfriend is Indian (been together for over a year now). During christmas break he went to india and got a lehnga made for me, he took my measurements and everything. It's so beautiful and i thought i could surprise him by wearing it to prom. I know him and his parents would love it and i'm confident in wearing it because I know I'm not trying to culture appropriate or anything. I'm just appreciating what he got made for me and his culture in a way. But I am kind of scared of what people would say about me? What are your thoughts? Should i wear it, should i not? I don't want other people to get offended or anything. Please don't attack me if you don't think it's okay, just simply state i shouldn't wear it. (For those of you that don't know what a lengha is here) 
A lot of people are worried at dress code for prom. We don't have one, It's just don't show your boobs and butt. We don't really need a dress code because no one really gets that risqué with prom dresses since i go to a charter school. They don't consider midriff risqué for prom either. Also i've checked with my school and they said the dress is fine.