She's cool with it but most probably because she thought i was joking around which i wasn't. But ever since i asked her out, she seems to be ignoring me because in my class, there are only 6 boys and you can sense that you're completely left out
When you asked her out ... What was her answer?
And it doesn't matter if all your friends are in relationships. That confers NO obligation on her (or you) to be in a relationship.