I have always been a big proponent of blending my different friend groups. I’m usually the first person to say “Hey! You should know this person because you guys have a lot in common!” This rarely backfires on me because I think my friends are the best folks on earth.
However, when someone is so unhappy and all they ever do is complain about not having any friends, keep in mind that introducing them to your friends might not be such a good idea. There’s a reason some people find it difficult to make and keep friends and when you’re listening to them complain…you’re hearing that reason loud and clear.
Just as you would want your own friends to be selective and caring about who they introduce into your life, you might want to adopt that same criteria when introducing people to them. Sometimes it really is better to just keep your friends to yourself.