If a guy acts different around you, does that mean he is interested?

Anonymous
Since day one this guy has not seemed like himself towards me. He was shy when we first met but he is outgoing and friendly with everyone. We only met up a couple of times after that. When he saw me the next time, he was incredibly nice and giddy. We haven't talked since then but I have caught him looking at me a few times and he tried to walk right next to me after class. Then we met up a while later and he was super serious, and not relaxed. He has become more reserved but I saw him do a double take and he has done some weird stuff around me. Why is it that this normally outgoing and friendly guy have a problem to act like himself around me? I do have a tendency to be a bit shy, so would that affect the way he interacts with me?
If a guy acts different around you, does that mean he is interested?
2 Opinion