My boyfriend and I are still students, and don't live together, but he knows all my CF stuff. He offers emotional support when I have a coughing fit. He gets my Pulmo ready for me sometimes when I'm home (MA for school, home is CT, and he lives in CT). I've taught him how to access my port, and he's only done it twice, but he's done a beautiful job both times. He does my manual therapy for me... that is, we taught him how to beat my back the right way and he'll do it for me if I need it, no matter where we are. Quick example, we were at his guitarist's house at a party and I started coughing pretty hard, and he offered in front of everyone, to beat me. It made me happy that he wasn't embarassed by it at all. When I'm on IV meds, he often hooks and unhooks them for me, so I can sleep. When I go into the hospital, he stays with me. He's seen it all as far as what I personally have been through, and go through.
Why are you scared to do them with her? If you guys are close enough to be moving in together, she should be used to the CF junk by now. I imagine she's more okay with it than you think. Sit down and talk to her about it, maybe.
People that are good enough to be with are usually more accepting than you might first think. Give her a chance to accept it, and I bet she will.