Can open relationships actually last forever?

I don't want to be in a monogamous relationship anymore. They make me feel sexually frustrated and I get bored. I've been enjoying my single life for some time now but I miss having a boyfriend. But I think an open relationship would suit me better. I've never been in one and I'm afraid that guys might not take the relationship seriously if we start off like that right from the beginning... Any thoughts?

Can open relationships actually last forever?
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