I am in a situation where, all my friends are often too busy, so I often spend weeks, here in college, without talking to another soul. To make things worse, I am very shy, and I can stutter a lot in voice calls. And thus, I am often too scared to try and message my online friends (I have only about 5, and they are the first friends I ever made in life, and I only befriended them last year), to ask them if they can hang out. I did once, but I need time to work up the courage again to ask for a hang out.
So anyways, what is it that you do, to occupy your time, when you spend most of your days with nobody to talk to? And you yourself are often busy with things in life?
I suggest joining a social or sports club. When i moved to a new city several years ago, i did not know anyone here. One of the first things i did was join a slow pitch softball league. I met a really great group, some of which are still my friends years later, and opened doors for all kinds of events and social gatherings.
To add to this, Meetup.com can be helpful for finding events near you, at least if you're near a city. I know the struggle to have a wide social friend network can feel very hard in the beginning, but it's nice to have other people to rely on.
I don't suggest joining a local or or vegan scene just for the social connections, but it can help branch out to like minded people.