Comment by neuralkoi
Start with the low hanging fruit: your family.
There was a period when I put space between myself and my main friends which resulted in loneliness, but I found this created a new space to connect with my siblings who were really interesting and had grown in ways I hadn't noticed.
Also, as Charlie Munger always said: "Invert! Invert! Invert!". Try doing the opposite of what you normally do. This requires of course paying attention to what you normally do (or don't do). Instead of waiting for others to reach out to you, for example, you might instead approach them.
Be okay with the fear of rejection. When we are kids we make friends so easily because we haven’t yet learned to protect ourselves from rejection.
An interesting exercise I had to do recently as part of a teambuilding exercise: offer a hug to 5 random strangers. I promise this will teach you something about yourself, and about others.
> Start with the low hanging fruit: your family.
Not always a good recommendation. A huge reason I was isolated before university was because of excessive control from my family. I'd personally say sports or other common outdoor activities like hiking are a great way to meet people. No strings attached and much more natural than randomly hugging strangers.