I started running fitness boot camps not only because I knew how effective group exercise was at getting results, but because I had seen and experienced how much more fun participants had compared to working out in a gym.
Even after a really hard training session that left people unable to talk, lying in a pool of sweat; as soon as they could muster the energy, they smiled and shared a joke with the person nearest to them.
Exercise should be tough, but if it's not fun then sticking with it is probably a losing battle.
You should carry this lesson over to the rest of your life too.
Challenge yourself daily with everything that you do, strive for excellence.........but most of all have fun.