What to do ?

I’m 20 years old and i saved up a lot of money from work. I’m an electrician started working right after highschool, I really wanna buy a car i’ve wanted my whole life for around 23,000, this car is my motivation to wake up everyday and go to work it’s all i think about. I’ve finally saved up the money and my parents are telling me this is the dumbest thing in the world to do and i’m blowing all of my money. And my gf of 2 years (F19) is now saying i care about the car more then getting a place together. And my grandparents are also telling me to save and me and my girlfriend who see eschother everyday can get our own place together. I’m really frustrated because this car is my dream and is why i show up everyday and it’s all i think of and now everyone is saying im dumb