Does the journey of life get lonely as your age?

I’m only in my 20s but majority of my time is spending time with family who are way older than I am. It seems like what I see on social media when people go parties and birthday celebrations, sure they have lots of friends and family but I guess they all go away and start living their own life and have a family of their own. Maybe they do gather up on special events. It seems like people as they grow older tend to value less friends and want real friends who are 2-4 people that they spend life with. Being there for each other. I’ve been told countless times get out of the house and make friends by joining a group or volunteering. Constantly get made fun of for being quiet and reserved. Sighs I wish I had great communication skills and willpower to being open. But I’m too worried about my insecurities and living in social anxiety. Even I envy at times when I see people my age group with bunch of friends who go to colleges and work and have fun times toghter creating memories and relationships