It makes perfect sense.
My moods change depending on whether I'm low or high. Being aware of that means that I can alter my meals and medication to deal with that so that it doesn't affect my job or relationships.
See your GP and try to get a referral to a dietician who specialises in diabetes if you can. They may not have all the answers but they can provide helpful insight into how best to plan your meals to avoid problems. It's not always easy but I have found that keeping to certain habits helps, like spreading my meals through the day so that instead of three big meals I have several small meals - a light breakfast, half my sandwich about three hours later, fruit or veg or yoghurt at lunchtime, the rest of the sandwich mid afternoon, a light supper, and if I think I need it a small snack before bedtime -- something high in protein is best because it is less likely to cause a morning low.
Avoiding the highs and lows means that you can keep yourself in a better state of mind. To me, it's accepting rsponsibility for my diabetes in the same way that someone with a peanut allergy would avoid peanuts. It's just how I live with who I am.