Alone he means he wants to do that alone

I don't have much experience with dudes, but ask him if anything is wrong or if he just wants space.

Oh yeah, alone time is too much to ask, he must just be a really mean person.

Ask him what's up! And be cool about it. Maybe it's nothing. Some girls are such drama queens. I hope everything is allright!

Some people can find being around others for prolonged periods of time mentally or even physically draining, so they need time alone to recharge. I wouldn't take it personally just yet.

I bet he had to poop.

He's probably an introvert. Sometimes, even really relaxed social interaction can wear them out.

You were cuddling. He just wants to watch TV

Being around a significant other can be exhausting, even if you're not really doing much. I love my girl, but I don't always have the energy to make conversation, listen attentively, jointly decide on something we both want to do, and hold back farts. Alone time is just the best.

Wanted alone time? Comforts of his own home? Don't jump to conclusions, OP