Making friends is easy, keeping friends and growing the relationships are difficult. I am mostly introverted but have periods of extreme extroversion. I'm 34 but all of my best friends have passed away from various accidents over the past decade. I feel like a shell of my former self where all I do or have a desire to do is work. The only person I consider my friend is my former boss who, after losing his wife to ALS…
I think that the most valuable (and appreciated) thing you have to offer are your atttentive ears and your time. That's what many people are looking for in a true, deep friendship.
The real frienship isn't about super-intresting hobbies or flashy personality but really basic things like listening each other, supporting i small or large difficulties etc.