I would continue to email and text her, even if she doesn't reply, she will know you are thinking about her. When dealing with grief it is not uncommon to feel like doing something one day and feeling too depressed to actually do it, so I wouldn't take it personally. Just knowing you are there if she needs you will mean a lot to her even if she doesn't know how to express it at this time. Grief can take time. She may even need counseling to help her get through this. She is lucky to have a friend like you.