It will grow back

It's only hair but for some reason I get attached to hair. My hair and especially the kids hair. Even B who is a boy! He has his hair kind of long-ish. It grew quite long and a few weeks ago DH took him in for a supposed "trim". Well, I was shocked how much he let them cut off and a little upset about it. I loved the long hair. It looked SO cute. Anyway, I got over it and it is only hair. Well, now J has it in her head that she wants a haircut. She has had only trims her entire 5 1/2 years of life. Her hair is about down to her waist. It is a light brown with waves and I love her hair. She gets compliments on it all the time and she has always liked her long hair. Well, last night she told me she wants to cut it to her shoulders!!! That would be about a foot of length cut off. She seems to be confident she wants to do this. However, I'm not confident at all. I feel anxious about HAIR! I think a lot of it comes from my own childhood. My mom always cut my hair and lets say she wasn't exactly a beautician. I always had wavy/curly hair and she would cut bangs and they would always end up super short and crooked looking. And I never had really long hair and always wanted it. Now my daughter has the hair I always wanted as a kid and she doesn't want it, so I know I can't make her keep it for me, but what would you do???? She is saying she wants to do it today after school. I will be so sad to see that hair go if I do it!!! But she should have a choice right??? What if she regrets it??? It is only hair.....