Sometimes friends have an insatiable craving to be together. Other times, they don't care if they see each other often. These could very well be the reasons for the seeming separation you are experiencing with her. Don't turn this into a big confrontational event. If you make more of it than necessary, you could possibly jeopardize your friendship.
Every friendship is based on getting mutual needs met.
Sometimes friends bond because they help each other with problems. Other times friends bond because of mutual circumstances, such as having young children, being new in a neighborhood, or taking the same classes in school. For example, some friendships are based solely on having mutual problems. No one wants to be with someone who makes them feel bad or inadequate about their life. Take responsibility for the role you play in your friendship.