Not being a conversational person.

I don't do small talk very well and I very quickly run put of things to say to someone I don't know so I don't like to just talk rubbish with someone, I prefer to remain quiet and get on with what I am doing.

I don't mean that the person isn't worth talking to or I don't like them, if they need something from me or have a question then I'll galdly answer or help them, but almost everyone takes it as a slight against them when i dont want to engage in idle chit chat and assume I'm an arsehole when I'm really not trying to be.