No, I don't think you can be addicted to a person, but you can fantasize about a person and decide to live in that fantasy. I believe an addiction involves a substance with addicting powers over everyone, or at least statistically significant :-) numbers and no person has that. But being attracted to someone and wanting to be with them is not necessarily a bad thing. That happens to everyone falling in love. The chemical part of that goes away after a bit though. Unless there's mutual love, there's no "reality" happening, it's a willful fantasy/crush.