I think do the "I am sorry...I am getting to go out" tag for a few Fridays (at least 2 Fridays in a row), and then see how things go from there. Don't rush into saying "Don't want to be friend" tag. I think after the 2 week "BUSY" tag, then if he asks, then use the "Is there something in particular that you want to discuss?". Don't mention anything about OW not giving him PERMISSION to talk to you. Well..just my terrible 2 cents worth...