I sometimes make alt accounts and pretend to chat with others online when really it's just me.
That sounds really shady. Why do you do this? Do you talk to a lot of people?
Yes. I know a lot of people on here and they don't talk to me as much as I'd like
If you are trying to make friends and lie to them when they find out they won't want to talk to you any more. It is not right to lie to people and lead them on.
It's fine.
It's not fine to lie to others like that. You need to be more honest with people you talk to online.