I believe there is a sylph or fairy in my house. When I was in high school I did a ritual to invite fairies into my home. I have noticed signs of a sylph and they have revealed themselves to me on some occasions. I have moved houses and I still sense them. Do fairies or elementals follow a person around, or could it be a different spirit? I have started leaving an offering of a small glass of wine, honey, grape juice, or cream every night and spiritual activity has increased since then.
Yes, it's possible for spirits to follow you around if they take an interest in you. It could be that you invited them over but never told them what you wanted with them and then never banished them properly either. The fae can be very tricky and mischievous, and I wouldn't recommend inviting any more spirits in if you don't know them well.
A Sylph has no fixed domicile they roam from place to place. They are a Air elemental, their domain is the skies, wind, and air. They actually allow us in their space, but rarely will they follow any particular person. They can be helpful, or very spiteful, so be very careful.