I don't think you need to necessarily end the friendship but more come to terms with the fact that the nature and level of your friendship has changed, especially on her end. It doesn't appear she values you as a friend the way she maybe once did. I do not think you should invest as much time and energy into this relationship as you might have done in the past because it appears it will not be reciprocated.

It is very hard to deal with when friends disappoint us and do not hold up their end of the friendship but does that mean she does not have any place in your life other than room mate? This something you need to ask yourself and try to communicate to her when you do decide.

People change and friendships change as a result. Who knows what the future holds for you two, things may come full circle and you will end up being close again but for now you might need to keep your emotional distance. Only you can decide what works best for you just give it alot of thought.