My parent's are trying to hook me up with a 19 năm old boy but I'm already in a relationship what should I do?

Tell them you're not interested?

Well, yeah I guess my answer is just like the trước đó ones. Tell your parents that bạn can't be "hooked up" with this guy, since you're already in a relationship. Seriously, though, shouldn't your parents know that bạn already have a boyfriend? Who is this guy, anyway?

It's probably something like your parents don't like your boyfriend, right?
Well, if that is right bạn just need to tell them, that your staying with your boyfriend, bạn like him a lot, and it doesn't matter who they try to set bạn up with, and you'd really like them to be okay with it,
But do it in a civilized way, parents don't do well with anger hoặc bạn yelling at them, so try to refrain from that, and try diễn xuất thêm grown up

just explain them the situation bạn are in,they have to understand

mum and dad i have somthing to tell bạn that I want to also have my opinion on this, that I like some one who i know really well and i... (just tell them what bạn think)

Tell your parents! Explain to them that it isn't right for them to make bạn be with someone when you're already with someone else. After all, this isn't the Medival times!

Let them know your happy with who your with and aren't interested in dating anyone else at the moment.