First you don't repent to the "church" you repent to Christ ( God) It is really not other church members business what you did or did not do.
Since in the bible people danced, I have many times been shocked by how many "laws" churches can have that are not from the bible.
If you were not doing anything with a boyfriend, there is nothing wrong in watching TV together so I don't even know what you needed to repent about there.
But if you don't want others to control your life, stop letting them. it sounds like you allow this to happen out of a fear based on a life style choice you have made.