I measured my blood pressure for some time now and it's 119/67 on average, i remember my diastolic been 80 before, concern?male overweight 24y-old

Consider a check up: The in measuring pulse pressure, diastolic pressure being lower is more significant in your age group. You are overweight and both factors have been seen as a predictor for diabetes . Also, there maybe aortic valve issues which should be detectable as part of a good exam. You already know you need to watch your diet and lose weight. See your doctor for further recommendations.