Have you ever had a time when you're in a social situation but you just suddenly lose interest in talking with barely anyone? You enjoy being in a crowd, but you just don't wanna talk. You're not inferior, anxious, or anything. You just feel zoned out and tired all of a sudden and you're just really sleepy and unfocused. Or suddenly you rather do things alone, but still want your friends to physically be around you.

Sometimes I find it hard to tell others when I'm like this because one minute I'm a loud party girl then suddenly rude and cold and people just get scared/anxious when talking to me (and apparently I have a dominant personality). I don't feel depressed though, just guilty to others when my mood suddenly went down

If you have, how do usually deal with it?