Use this format to frame your conficts...
"I feel __ when you ___ [Because ____] . I'd appreciate it if you did ____ instead."
Eg. "I felt angry when you watched Game of Thrones without me because you promised that we'll watch it together. I'd appreciate it if you wait for me to watch it with you instead."
The 'When you __' part should be something concrete. A good way of picking what to say is if a camera can see it. Eg. Say, "I felt afraid when you shouted at me." - rather than "I felt afraid when you got angry at me."