I can totally understand not wanting to feel anything. It's more of a hassle than it's worth sometimes. Perhaps, Robby was texting you and his other friends in the class. I mean you don't know for sure since you probably didn't see his phone and text messages. Some people text multiple people at once for whatever reason, probably boredom and a case of add. From what you said in your post, it seems like he wants to be on good terms with you and is slowly making an effort to do so. In truth, guys at this age don't always know what they want so they act out irrationally sometimes, making it hard to figure out what's going on. It sounds like a confusing situation, so it's really up to you and how you feel about this. Are you comfortable talking to Robby as a friend or an acquaintance, or is it still painful dealing with him? These are the questions you can ask yourself to decide how to proceed next. It might help sort out some of the complications that way...