People who think that it's a sacrifice not to eat whatever they want, thoughtlessly and whenever, and it's a sacrifice to go to the gym instead of sitting in front of the TV "relaxing after a hard day" have an odd idea of what sacrifice is. Looking great and feeling great is a sacrifice only to those too lazy to actually do what's required. EVERYONE would like to look fantastic. EVERYONE wants to feel great, and be filled with confidence and high self esteem. But most can't keep their mouths closed or get their feet moving, so they delude themselves into thinking that achieving the above requires sacrifice.
I've trained non-stop except for time off for the flu or colds for 25 years. And as you go, you become motivated by your successes, even though I was never happy with my own progress. No matter how good I looked I always thought I should look better considering my diet and exercise regimen.
Progress will ALWAYS seem slower that what you anticipate. You just need to celebrate the gains you make and keep on track. As I always say, looking this way and feeling this way is so superior to any food or time that others think I am "sacrificing" —that their not getting it just makes me chuckle. I know any negativity from others is just an expression of their own disappointment in themselves and their lack of will to go after what they really want.
When it just becomes part of your lifestyle rather than some sacrifice or challenge it's far easier than the couch potatoes want you to believe. diet and exercise regimen.