Is it normal that my boyfriend wants to spend every minute together?

We've been together a year. 5 months in to the relationship, I had no place to live and he said I should move in to his/his mom's house. I was/am a broke student, so I did.

He wants to spend ALL of our time together. Sleeping, time at home, driving to work / doctor's appointments / errands, seeing each other's friends (never alone), doing work at coffee shops, etc.

Often at in social situations, I have a hard time enjoying myself because he very naturally tends to be the center of attention (like, all the time). He's witty, intelligent, has a lot of things to talk about, both personal and otherwise. And he's loud, and really upbeat, because he's at a great point in his life. No money troubles, his career seems to be taking off, and lots of our peers and colleagues respect him a lot. He isn't exactly a showoff, but the result is the same.

I feel like conversations are naturally sprinkled with him steamrolling everyone with knowledge. Sometimes I KNOW what he is saying is wrong or incomplete, but I don't get involved. Why? Because he will question/argue/disambiguate/ask questions until, at best, others in the vicinity think I merely had a minor point to add, and at worst, will awkwardly avoid acknowledging what I said because it seems like I'm starting a confrontation. I am not so anal that I want to correct him - it's just that otherwise he monopolizes conversation! And he always corrects me in front of others.

Mostly, the loud personality wouldn't bother me much if I was naturally an introvert. But I used to be like him, the center of every social interaction and a fountain of stories and knowledge and energy. It really GRINDS me down because I had a lot of hardships these last two years and I've gotten kind of dark and would LOVE if every conversation wasn't a grueling fact-check/squabble/powerplay. It's just exhausting.

So, I would like to at least socialize alone, but my bf seems confused and crestfallen whenever I want to go see a friend alone and I often have to reason with him or explain myself and usually I don't go. It's like our baseline is togetherness, thus EVERy time I want to be alone I need to explain.

Thoughts?