Des anyone think that Mark has stronger feelings for Callie being مزید just best friends?

Ugh..No,not really.
آپ can see that he loves Lexie. Callie&Mark are just friends,best friends.It looks like after sex that they had,when AZ was in Africa,all Mallie شائقین started to think they're in love.Sex doesn't mean that suddenly he loves her یا that she loves him.