Hi Jan,
Hope you enjoyed your night out
I take Humulin S which I have to inject 30 to 40 minutes before eating and when I eat out I discretely inject into my abdomen straight through my shirt without revealing any flesh, I felt slightly self concious doing this the first couple of times but now I do it without thinking, I refuse to skulk off to some dirty toilet to inject myself, and if anyone has a problem with that it is their problem not mine.
I doubt if anyone has seen me do this as most people are more interested in their own food or company to worry about what I am doing
Just remind yourself, you are diabetic not a junky and do what has to be done