An Unofficial Girlfriend? What's That Supposed To Mean?

So I've been talking to this guy for a while and he likes me and I like him too. He says that I'm his "unofficial girlfriend" yet he still says that he wants a girlfriend (not to me, but I've heard him say that). He hasn't been texting me very often and when we do text I'm usually the one to text him first and by the end of the day we've only sent lik 5 texts and it stopped because he never texted back. I don't understand what's happening because if its an unofficial relationship then how will I know when ita over or when he stops thinking of m as a girlfriend. What do I do I'm so confused.
An Unofficial Girlfriend? What's That Supposed To Mean?
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