Feeling embarrassed about an incident this morning with a school parent 
Good friends husband was in a cafe this morning that I was in. He was sitting with his back to cafe so as I was ordering I touched him on the shoulder and said hi. He literally reacted like I had behaved in the most over familiar way ever and it was all really embarrassing but I was just being friendly and have known the family 6 years and been to loads of social events at their house.
I feel really embarrassed but aibu? I was just being sociable but his reaction was of total WTF!
Aibu? I feel really embarrassed now but was honestly just saying hello 