No, it's not because of using social media too much. I have the exact same feeling. Most of my Facebook friends are people I met in grad school in Thailand. I d

No, it's not because of using social media too much. I have the exact same feeling. Most of my Facebook friends are people I met in grad school in Thailand. I dropped out and moved back to the USA. Thai people are about 20x more active on Facebook than the average American and they had the time of their lives after I left and the party is still going - and they document every second of it on Facebook. Deep regret/sadness is exactly how I feel every time I see their photos filling up my feed.