How can I boost my metabolism, I work out 5 days a week and am starting to eat healthy?

Continue. Exercising earlier in the day has been shown to boost metabolism and weight loss more than later in the day, but exercise anytime is better than none.
Eating meals. You need to eat small meals multiple times a day as this way your metabolism will constantly be active. Do not just eat one large meal at night and then go to sleep as this is recipe for disaster and will lead to weight gain. Good luck.