Search Results: always coming on to me

We're in the same classes and have friends in common. Everytime we have a conversation it's always short with a bit of teasing. Everytime I walk past him he always wants to say something even if it's not necessary. And if we're in a group setting he'll sit next to me or if he can't he'll hover stand behind my seat even though there's seats available. A party is coming up and I mentioned that there's a chance I wouldn't attend due to my parents. He has been talking/begging me to attend it. Lastly he even jokingly offered to kidnap me. He always tries including me in conversations and trying to make me laugh, I do the same. He is also very chivalrous with me ( I noticed he's like that with everyone though). Recently though as we were walking out class I was behind him and we were talking and his friend came and said "oh I think I'm disturbing a couple here" I'm not sure what he said exactly. Since I didn't hear him properly I kept saying what? He then became off-ish and shook his head at his friend, I think he also whispered don't say that. Did I confuse his friendliness for something else?