I think you should gradually become used to the presence of your MALE pee buddy while you are urinating. So you may need e.g. 1-2 meters between you at the beginning, and subsequently you can come closer and closer. If the cubicle is large enough, I think you should enter THE SAME cubicle. If the cubicle is too small and/or you feel you need much distance, I could advice you to keep the door open and your pee buddy immediately out of the cubicle. Try to talk with him while trying to pee. As for me, it was very relaxing to talk with him. In my case, after a few times, I was able to pee with my pee buddy at a elbow-to-elbow distance, as in contiguous urinals without dividers or in troff urinals, where you are able to choose the distance (but i think they are more difficult because they allow less privacy. When you try urinals, try the last of the line, and initially put you a little oblique towards a corner, in order to feel more comfortable. The same in a troff. In the troffs, you may feel more comfortable if you put in the corner where the drain is, so you are sure that other men can't see your urine, which can be embarrassing. If you failed, don't give up. Next time you'll do better. Your pee buddy should be reassuring you. Mine was.
Please contact me again if you need more help. Nick