Some decisions become obvious after social pressure leaves the room.

Social pressure operates in the room and dissipates outside it. The decision that felt impossible with everyone present frequently becomes straightforward on the walk home, which tells you that what was hard was not the decision but the audience for it.

Whenever you can, avoid deciding anything significant in the room where the pressure is. Say you will come back with an answer. Then decide alone and communicate it afterwards. It is a simple procedural change and it removes a large source of choices you would later regret.