>>24186333Lots of people get a bout of depression as the weather gets nicer because everyone around them is changing habits, going out and doing stuff together and having fun outside and they have nobody.
Plus the increased sunlight means more vitamin D, which can throw off homeostasis and take your body a little while to adjust. Generally you'll feel more restless, have more energy and crave more proactive stimulation (as opposed to passive stimulation, like watching tv or streams). This can make people feel dissatisfied with their lifestyle, which can compound the feeling of "gee I wish I had someone to go out to the park with like all these happy couples on tv"