Arranged to marry at 16, not feeling right...

By mistake do you mean having a boyfriend? Well, you can't help who you fall for, hon. I understand that. However, Islam has limits regarding the mingling of opposite genders because potentially one thing can lead to another. And your mom is worried about "one thing leading to another".....especially since teenagers are surrounded with various influences and pressures and raging hormones.

I'm not saying that you are an irresponsible teen at all. I'm just saying that perhaps your mom is afraid of such things.