I'm confused about this.?

I have a lady friend I've known for a good many years. We've been out together over the years but strictly on a friendship basis. I admit I was interested in her years ago but she made it clear at that time that our relationship was strictly platonic. I accepted and respected that and never made anything more of it than that. Since we first met she has married and divorced. In between time she kept almost no contact with me. Afterword, she started calling me. So we'd meet casually which is OK but I lost interest years ago. I got the feeling that she wanted to be more than just friends but also feel that if I wasn't good enough before why am I all of a sudden good enough now? Believe me, I've seen her with her share of losers. I admit maybe I should have just confronted her about it but I didn't want to create any uneasy feelings. So, I gradually turned down most of her invitations. Now she about totally ignores me though I would still like to be friends. Why is she being this way?