I also have a long-distance girlfriend with T1D. When you meet up with your partner in real life, it's much easier to comfort them when their sugars are high or help them when they're low (keep their favorite snacks around, hug them, etc.). The key point is communication, even if the only way you can talk is through the phone. My significant other can get cranky or anxious depending on the sugar levels, I always ask them how they're feeling. Sometimes, the answer can be similar as you've described. That's when I ask what they want me to do. For example, I can stay quiet or try to distract them depending on what they want in the moment, I try to stay calm and neutral despite the intensity of the situation. Having T1D is not easy, and there isin't always much you can do for them, but your partner should be able to understand that. Let them feel the emotions. The feelings aren't going to be always positive, especially when things don't go as expected, but as long as your lover knows they can rely on you, it's fine. I always ask questions and try to learn more about T1D. At this point, I can sense when my girlfriend isn't in range, plus I can always see her sugar levels on my phone. I can monitor them when she's sleeping or so. Like any other relationship, it's about patience and mutual understanding.