I was honestly much more isolated in college than I have ever been since graduating and getting out into the real world.

I have always been a member of a church, so there is a natural connection to others regularly there: in service, in classes, in small groups, in choir. It is more than just going to services on Sunday; many opportunities exist for community service and other activities. Church isn't everyone's cup of tea, but it has been my primary connection to a group and I have developed many long-term friendships there.

I also connect with my major interest: music. I am a member of a large musical organization that meets regularly, performs together, socializes, and travels together.

Life is as isolating as you make it. If you only stay at home and go to work, yes, you may end up very isolated. However, if you find interest groups to join that meet with some regularity, you will find you will branch out. They can come in many forms. I know one person who volunteers with a dog rescue organization. They dog-sit each other's dogs, go to community information activities, socialize with each other while socializing their dogs. Another person I know meets early every morning with a group that works out together and they have developed close friendships over time. Another decided to learn to dance and joined a group that meets to go to clubs where they dance probably a couple times a month.

You have to find your niche. Better yet, niches.