As human beings we love reasons. So, basically, you went somewhere and made the assumption that people were not talking to you. You then decided that there had to be a reason for them not talking to you and you then decided to draw on negative ideas about the self and choose the reason that you must be coming off as creepy.
You filtered out that you have no idea about what other people were doing, their motives, the reasons behind their actions or the absence of reasons behind their actions. You filtered out that they may just be in bad moods or need time on their own for some reason. You filtered out that we all observe, assume, interpret and put meaning into things and get it wrong a lot. All to strengthen and conform to a view of the self which may well be something you either believe to be true or fear may be true.
"Outgoing people"? I've had people tell me I'm a really outgoing guy and other people tell me I'm a shy guy and other people tell me I'm somewhere in the middle. That's mainly because (again with the reasons) people change and move depending upon circumstances, internal and external influences etc. No such thing as an "outgoing person" in general. For one thing, lock them in a room and they've got nowhere to go out to. But headspace thinking insists on locking life into science experiment terms where people put other people into cateogiries and try to measure that which moves so fast we can't even see it sometimes.
Such is the power of assumption, belief and beliefs about what other people believe. and the power of a negative belief system informed and created identity construct.