A single parrot can indeed feel lonely if it lacks the company of its owner. If the owner doesn't have much time to spend with it, it's best to keep a pair of parrots.
Lovebirds, also known as pocket parrots, are emotional creatures. Without a companion or prolonged interaction with their owner, they can experience loneliness and depression. Therefore, if you only keep one lovebird, it's crucial that you spend ample time with it each day. Otherwise, it’s highly recommended you adopt another lovebird to keep it company. A lovebird living alone without any companionship from other birds or their owner will feel very lonely. Therefore, it's not advisable to keep just one lovebird; if you do, you must engage with it regularly through interaction and play. This companionship is essential for their well-being.
Parrots are naturally social flock animals and often struggle with living in solitude. If a parrot keeper only has one parrot, they should dedicate extra time to it, making sure they feel less lonely and build a strong bond. Parrots can be very affectionate when they are well-bonded with humans, making them excellent companions. If you are unable to provide your parrot with enough companionship due to time constraints, consider adopting more parrots so they can keep each other company. A parrot living in prolonged isolation is likely to develop mental health problems, which may manifest in loud and disruptive behavior. The key is to provide sufficient social interaction to ensure their happiness and prevent loneliness.