I'm going to leave my friend for another without him noticing
Why was there a need to make your friend lose face?
There was no need for my friend to lose face. I just wanted to live my life.
Regardless of your desire to meet with another friend, you shouldn't leave your friend in the middle of spending time with them. They may find out later and report it on social media as a result.
I'm not worried about my friend doing that.
All the same, it's not very kind to ditch your friend in the middle of an activity.