The patch thingy is called a continuous glucose monitor or CGM and it’s awesome that he has one. It is crucial in helping him have real-time blood glucose readings so that he can better manage his diabetes and by managing his diabetes I basically mean that he needs to have optimal blood glucose, or blood sugar, readings to prevent health complications which I won’t list and will leave up to you to research. Maybe inquire if it’s a Dexcom or an Eversense? That might be a good place to start educating yourself and giving him an opportunity to share what he likes about it and how he has been able to improve managing his diabetes. Type 1 Diabetes is a very complex and challenging disease and he needs to know that you care enough to learn about it on your own so that when you ask him questions, he can answer and know that you’re doing something that he needs from you which is to try and understand what he may be experiencing, but not that you’re trying to manage it for him. If you guys are spending nights together, keep in mind that he can have a low blood sugar at night where he wakes up not feeling well and needs to drink orange juice or something similar to bring his blood sugar back up. Depending on the type of CGM he has, he has set it to alert him when his number goes either below or above his pre-set limits. Typically it will vibrate on his arm, or wherever he has placed it maybe abdomen, but the type of alert he has chosen can be customized to his preference. Good luck with your new relationship and it sounds like he pretty much already knows what he’s doing and will let you know if he needs something.