FOMO and trouble making friends

Hi. I'm new here and still figuring out how everything works. I'm 28 and was first diagnosed with depression and anxiety about 5 years ago, though I'm sure I struggled with it a lot longer than that. I'm finishing a grad program and changing careers. With all the changes happening and with all the stress I've been feeling from having to work full time and go to school and now do an internship, I've been feeling a lot of anger about feeling like I really missed out on just having more time for a social life. I struggle so much with making friends to begin with. I never made any in college and aside from my best friend whom I met at my first job, never made any friends at work after college. I always feel like a loser sitting at home every night on the weekend. I only have a couple of friends so if they're busy or not up for something it sucks. I try to do stuff alone but I feel like you can't really do everything alone.