My first question was how do I visit people in witness protection.. I am the boyfriend trying to contact my girlfriend.

You can't visit
To go in witness protection you have to leave everyone you love behind to save you own life

Hey I hate to say this but you can't vist someone in witness protection my boyfriend got put in one just a few months ago and I haven't seen him since if you want more info read zachs lie and jacks run by roland smith

It's a 'protection programme' which means absolutely no one he knows can contact him, he can't contact anyone he knows. Otherwise what is the sense.