Haven’t met any of his friends?

We’ve been together (yes we’re official) not 7-8 months now and he usually will mention a friend or his best close friend every now and then and tell stories. But I haven’t actually met anyone. We were suppose to meet his friend at a lake house during the summer but plans fell through. I brought it up with him and he said it’s because he doesn’t have many friends and the ones he does have, is his DnD video game group that he meets with on Sundays. Also he said that there wasn’t a time to find to hang out with them because he never goes out (he works from home) so should I be worried if he’s seeing someone else and all his friends know her? What are your thoughts, would you break up with someone over this?

UPDATE: we don’t have each other on social media