I will be happy to know why you felt that I was unfriendly, so that I can improve.
I have never received such a feedback, from an airbnb host or elsewhere.
I am quiet indeed and was minding my own business, though I do feel that any communication with you was done with a smile and in good spirit. airbnb is not couchsurfing and so hosts are not usually expecting from the guests to socialize. If this is what you expect from your guests then you should mention it. Notwithstanding the above with I am always happy to be friendly and socialize with anyone, if I feel the willingness from their side; however you yourself seemed very quiet and even timid and I didn't want to disturb in any way.
If there is any specific manner in which I acted that you can point out as "unfriendly", I would really appreciate if you can let me know what it is.
Thanks & good luck with your airbnb business.