Am I wrong for wanting to be alone in a relationship?

The person I am dating is more clingy than I expected. They expect to come over my house every night. To the point they’d text me ‘I’ll let you know when I’m here.’ I don’t mind but I like my personal space. They don’t work currently due to lay off so they’re bored all day. Every time I tell them I’m ok for a night alone they get defensive. Why can’t some understand a relationship doesn’t have to be 25/8 under a person. Besides we can always talk on the phone. Am I wrong?
Am I wrong for wanting to be alone in a relationship?
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