Sweet 16

So for this dance we have to ask a boy and I’ve already asked someone but my mom doesn’t know and it’s awkward if I tell her because she wants me to go with this guy who I’m kind of uncomfortable around bc we went to 8th grade dance together and he brought a bunch of drugs to it anyway I don’t know how to tell her, also not a lot of ppl know I already asked him and so they are trying to set me up with that same guy that my mom wants me to go with what do I do