Do I have the right to be with someone?

I’m so toxic that I even know that I don’t. I try constantly to stop having feelings for anyone but it’s hard. People say it’s normal to want someone, but it doesn’t feel normal to me. I have to constantly keep myself distracted but it’s impossible. I always end up feeling bad and it scares me shitless. I need helpful advice.
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If I think about staying single, it calms me down. Because I believe if you stay single, nothing can go wrong.
Do I have the right to be with someone?
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