If I were you.... I would give her some space. Get a new focus. You could be coming across to her as "too available" which could make her want even more distance from you. Write down on paper- what it is that you miss about her. Decide if you miss "her" or the relationship. Many times we want what we can't have because we can't have it. Examine yourself and decide if thats you.
Are you missing out on her? or is she missing out on you?
I hope that it is the latter...if it is not... then your focus should be on putting more value on YOU.