I am moving out next year and settling, currently working at an office. I am 25, I returned from a different state and will be staying with my parents for a year. My dad has a habit of barging into my room and doing his things while I am on a call with my Girlfriend, or when he hears me calling someone he would loiter outside of my room and this is making me very uncomfortable. Yesterday night when I am on call with my girlfriend because we are planning for transfer of our office to a nearby town together, he started coming out of his room and stayed near my door, and it made me extremely irritated so I put the phone on mute - went out and told him how I felt and that I am not a kid anymore and to respect some privacy. This turned into an argument. I should not have shouted but I could not stop, this has been going on frequently. How could I have dealt with this properly ?