Loosing weight

For over 5 years now I've been trying to loose weight. Im about 78kg bjt I want to be 65kg. Not that I feel ugly, I think I'm sexy anyway but at the same time I want to be healthier and fit. The problem is that I always try to diet or exercise but I never keep to it. I alwasy range around 74 to 78kgs but I feel too lazy to put more effort into it. Plus, I feel I can't afford to eat as healthy as I'd like. But at the same time I'm very comfortable with how I look. Is it ok or should I try harder?