Mitch,
Calm down..maybe dad has his reason why he's doing that..have u tried discussing it with him?that u didnt like it when they meddle with ur private life?my parents too are sometimes like that but not to the point they will call or text the numbers on my phone they will just check who i am talking or chatting with because i am not used in sharing with them all details about my private life and after we have a heart to heart talk we had a chance of explaining our sides and right now that i am engaged to be married they trust me now with my decisions since they know i love my fiance..
Maybe ure dad is just concern about u..u'd better asked him why he is doing that to clarify things..