The "Loyal" singer, 26, was dumped by his on-and-off girlfriend Tran in March after it emerged he had fathered a child with his model friend Nia Guzman last year.
"It is a simple yet profound truth: happiness is a choice. You don't have to wait for everything to be perfect in your family or with your business. You don't have to forgo happiness until you lose weight, break an unhealthy habit, or accomplish all your goals. Happiness is your choice.
"To do so, you must learn to live in today, one day at a time; better yet, make the most of this moment. It's good to set goals and make plans, but if you're always living in the future, you're never really enjoying the present in the way God wants us to," he added.