Talk to your friend. Find out what was actually said as it may be a bit of a 'chinese whispers' scenario where what she actually said was something more along the lines of offering to see whether you like her back and put in a good word for her. Or it might have been said in a more jokey way. So basically, start by getting the truth. Then, if what was said is still something that offends you or hurts your feelings explain how it makes you feel and why. Explain that you thought, since your friend knows how important your religion is to you, that she would have realised saying something like that about you would be hurtful to you. Your friend probably didn't mean anything by it, even if it was a little insensitive, and will most likely be very apologetic. Clear the air and then you can get your friendship back to normal.