It's all very interesting.

I have an idea about it...

I think it's possible that you seeing yourself at your father's house is a representation of you being at "home".

Given that your girlfriend lives in the US and you live in the UK, I think you talk on MSN a lot to keep your relationship going... Her being in your home and not talking to you is not the way she would normally communicate with you... She would communicate with you most of the time on MSN. So being silent in your home is the representation of this.

(I may not be accurate about the MSN communication between you both).

The chastity belt is a key image... This is a representation of the ocean that separates the US from the UK... Distance - impossible to easily penetrate.

It's not so much a sexual thing, but a representation of the physical separation.