Did she lose interest?

Ok here goes. Meet this girl about a month ago we live a distance apart so we haven't actually met yet but had planned on it. Anyway the first 7 days she would call and text constantly and we would spend at least 2 hours or more on the phone each time which was cool. Then something changed and not really sure why but she called late one night and I didn't answer and since then the calling and texting have come to a slow and intermittent pace with me now being the one to make first contact. I have asked her on different occasions if she still wanted to pursue this and if she felt comfortable with it and she said yes but with the lack of communication I don't know. I know and understand people get busy and life gets hectic but if it's not something you want just come out and say it. Hell I even asked her straight out once because that just how I am. I don't like games but at the same time I'm really interested in her and don't want to quit without truly knowing. Anyway any information or insights would be welcome.