Is this cheating?

Okay so I personally don't think it is but I just want to know what you guys think. Don't say stuff like well if you have to ask if it's cheating hen clearly it is. Because no I don't think it is. 
My brothers mate (19) left the hospital from visiting (my brother was in hospital) and he kissed me on the cheek and hugged me goodbye. It was just a friendly kiss on the cheek if you know what I mean 
And today 2 mates I bumped into at the shops said hello and kissed me on the cheek hello ( it was one of those kisses where kinda just your cheeks touch )
Thoughts?