who is ignoring here is the guy ... he does not want to listen, talk or hear anything ...

Ignoring the guy is not the right thing to do especially if you have to see this guy everyday in front of you ... being an office mate, a house mate ... with those there is no way that ignorance can solve anything as you would face them whenever you will go and wherever you will be ...

So telling them from the beginning would be the first step, and based on their reaction you will think of what to do next. Some would never agree and would continue doing that.

I'm asking why would someone would force himself on a girl not unless he wants something or had something in his mind ... Love does not need to be forced, it is just a mutual attraction and acceptance from both sides ... comes naturally without forcing anything ...

Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment. (Gautama Buddha)