How do I convince my parents not to cut my hair so short?

My dad wants to have my hair cut short but I don't like it. I look like Dora. No offense Dora lovers. I've had that hair and it took me 2 years to grow it back. And I like my hair long. It's the length of half my back and I am 4"11. My dad is making me cut my hair like 5 and a half inches. No way hozay. And I want side bangs and my hair cut like Selena Gomez. Maybe some wavy hair and layers too. So can you guys give me some ideas. I'm getting my hair cut on Friday. Thanks :)