Is it safe to work out extensively everyday? or should i give my muscles more time to relax?

That depends. If you are a runner & need a lean muscle mass and tolerant skeletal system daily workouts (runs) make sense. If you want to build muscle mass rotating your workouts to rest some muscle groups while working others is more productive.

Moderate intensity exercise will provide you most of the benefit of exercise without the risk of injury that may help with strenuous exercise. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs.