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You can file for divorce based on wherever your husband is currently a resident. That means you would need to file in West Virginia, if he still lived there. However, your problem will be if he does not agree to a quiet divorce and decides he wants a trial or lots of hearings. You would need to be able to attend those hearings and trials.
That will be an issue then. If you don't have residency anywhere, then you will not be able to file. Most states require that you live in the state for at least 6 months before allowing you to file. The other issue is that you have to serve him with divorce papers in order to get divorced. If you don't know where he is, then you'd have to ask the Judge to put a notice in a paper in the last known area where he lived. The process gets more complicated and lengthy if you don't know where he is.
If you are not willing or able to establish residency in the US, then you'll need to make some attempts to find him, by hiring a private investigator, or trying to find him through public records on the internet. If you know someone's name and birth date, you can often find them through drivers license records or voting records. Research libraries on college campuses and law school campuses often have access to public record databases for free, or you can pay for a service like www.publicdata.org to try to find him.