The chances are high that your dog is cheerful because of you. You're the best friend here, and as such, any amount of time with you is treated like gold. So, why not make your pupper's dream come true, and have a movie night? Gather some blankets and pillows, free up some space on the couch or floor, and then make a big bowl of popcorn for yourself (dangerous for dogs), and get a dog-safe peanut butter treat for the dog. Make sure to pick out an animal movie!
It could be a dog park, a national park, a regular children's park with swings and slides, or just an open field where you can play fetch. Whatever type of park it is, take your dog there! It's a nice area to run around and get exercise. And you can make your dog even happier by doing high-energy burning activities like playing Frisbee, chasing ducks, and getting to know other dogs.