Boy issues

Well this guy been talking about how much he liked me for some weeks now and when I give him a chance he message me and it's all good then the next morning I find out that his telling his  friends I'm a stalker ( which is not true I don't follow him on social media , I don't even know his last name, where any of his classes are tbh I barley knew the kid) what's going on? Because I'm kinda lost can anyone explain and if can help me guide me what I should do. That would be really helpful.