Yeah. She's not taking this seriously, which indicates a lack of self-respect. Humoring her with this merrymaking camaraderie is a detriment that will make the problem seem less serious than it is, allowing her to carry on following the seductive sound of her siren boyfriend.
IEI: Break up with your asshole boyfriend, stop letting him lure you away from any facet of self-respect, and find someone who will actually enhance your life instead of emotionally leech off of you. If you care for your happiness in any capacity, you will immediate leave him and be wary of others like him for as long as you live. This is the only good advice you'll receive here; the truth won't humor you with pleasantries. Either live your life or waste it. Up to you.
There's no gray area here. Just a choice between being happy and being miserable.