Any advice?

So I am 16 almost 17 junior in high-school and my mom won’t let me get anything close to a thong or push-up bra. I hate that she won’t let me but we get a lone and it is very rare for us to argue. I just don’t try to push her when she says no but I really want one is it bad that I just wanna feel sexy I feel like it would make ma a little more confident. I am very shy I don’t want them for sex or anything. Just to feel bette Ron the inside. Is this bad? My mom believes that they are only for sex is that true? I don’t believe so but what do you think?

Ps : I am a virgin and I am dating my first boyfriend it is going on 6 months but we have both agreed that we are not having sex anytime soon I have even thought about waiting till marriage and he is fine with it.