I think that it's possible to make them look as friends in both scenes, but the cost is to loose the general seriousness. I don't think that's a problem mainly because after the scene obiwan proves that he wasn't actually serious (you focus on the negative, he was pleased to see us). Besides, OT has a humorous note in very key moments too, think of Yoda reveal.

http://www.youtube.com/watch?v=eKPTM4m3IAI

I was short on time so I didn't take care of Jarjar, just focus in the elevator scene and then when they're sitted

The video has more than one interpretation and it's likely that obiwan sort of pushes him to fancy padmé. However, even if dominant in the situation, Anakin would be loosing this thing of I PROMISE you as if it was actually something important. Aalenfae's last take was down that route and the result was quite amazing.

In the end it can be done, but I don't know if it should be done to change the mood of the scene.