To cut a long story short, a good friend of mine in work was interested in a position in a different part of our department. He found out later that the position was just part time so he wasn't going to apply. I decided to apply as I believed that I would be able to divide my job between the 2 departments.
I later found out from him that he actually applied for the position and he hopes to be the favourite to get it. Later that evening I texted him to tell him that I applied for the position myself but I intented to withdraw my application because I wanted him to be the favourite to get it. I even sent him a screenshot of the email I sent withdrawing my application. This was yesterday evening and he hasn't replied to me at all. I'm terrified in case he thinks I betrayed him. He's one of my best friends in the place and I would hate for him to think that

I just don't know what to do.