This might not work for you of course, but when I feel extremely lonely or upset, I go somewhere away from other people, where I can think and do what I want. Usually I go somewhere quiet, like the woods near my house, and just forget about everything. That always helps
Apart from that, I talk to people on the internet or watch something funny or cheerful, a film or a YouTube video.
I thought about taking my horse for a trail ride, but its cold, and she a princess and wouldn't go for very long until she started acting up haha. I might take that advice. Just go sit out at the barn by myself. My horse has been my biggest suporter lately.