Is it normal to not want friends?
Depends.It depends
Yes, you can be happy without wanting friends, or prefer plenty of time to yourself. It matters more whether you feel content with that choice or lonely and cut off from people.
Some people genuinely don’t want close friendships, while others prefer a small circle or mostly enjoy their own company. You don’t have to want the same social life as everyone else, and you don’t need to force friendships just to seem normal.
The useful question is whether this feels right to you. If you’re content, that’s fine; if you actually feel lonely, or your wish to avoid everyone is new and making daily life harder, it may be worth talking it through with someone you trust.