Background: My girlfriend of 2.5 years recently found out that she has a sensitivity to lactose.  It's to the point where she can get too sick to fully function the day after a lactose-heavy meal.

At first, she used to be really diligent about eating her lactose-relief pills before eating.  For the past few weeks, she hasn't been using her pills at all, despite eating very lactose-heavy meals.  To help her, I've even started keeping a package of them with me if we were out and she forgot hers.  This has become more of a waste of space than anything.  I've been letting her know for weeks that she needs to be using her pills if she's consuming all the dairy that she does, but she always claims that they taste bad.  I've told her on multiple occasions that I don't like seeing her sick all the time.  Cue a few weeks of her constantly feeling unwell, and now she's completely sick (not going to school).  She once again had lunch yesterday without her lactose (pizza if you all cared) and I got upset with her when she told me.  I told her that I will no longer support her decision to ignore her lactose pills, as I feel as though I'm partially to blame for not holding her accountable before things got to this point.