Is it possible that my aquarius man ISNT cheating on me with his female friend?

My bf left England to fly to Ireland a few days ago. He has a friend there who he used to go to Uni with a few years back. He visits her once or twice a year, and there are pics of him in Ireland with her on his facebook (with his arm around her), he also has both me and her as friends on there, and his status would always say single, so its not like he’s ever put that he’s in a relationship with her. He has had relationships with other girls during the time he has been friends with her and was even engaged to someone else up until a year and a half ago and he still would have been friends with this girl then. I last saw him on the day of his flight, and without me even saying anything, he said “By the way, don’t worry about me going to see her cause it’s a purely platonic friendship and we both sleep in separate bedrooms when I stay in the house”. This is a guy who does have a lot of female friends. But I heard him talking to her on the phone (and he was laying next to me on the bed at the time), and I heard him calling her babe/baby and at the end of the convo he said “love ya too” to her. My friend said she has a lot of guy friends who talk to their female friends this way and that its actually nothing to worry about. My bf kept telling me how much he’d miss me, how he was looking forward to coming back and having my house alone to ourselves, and also he was trying to get me to do something to him ually which I didn’t feel like doing and he said “but you’re the only one who can give it to me, and I wont see you for another week!”.