It is normal to be a little scared about meeting the boyfriend's mom. Frankly, if you didn't care at all what she thought, I would think there was something very wrong with you.
That said, I think she will like you. You obviously worship the ground her boy walks on. You are a good girl that hasn't slept with 500 other boys. You are enrolled in college and making something of yourself. You are both of the same religious background and share similar values.
Personally, I'd be thrilled.
Just be your charming self, be polite, defer to her as your elder (remember you are trying to work your way into HER family, not the reverse, so you will have to be a bit more flexible than she needs to be).
Keep in mind that she will want you to like her, too. Moms are worried about their bitchy daughter-in-laws taking their sons away forever, too. :)