Should promises be taken seriously in relationships?

There are classic promises like "I'll never leave you" and there are casual promises like "I'll unfollow (insert guy/girl name)"

But most of those fall flat, could be because of how unrealistic they are and could be because of the person simply breaking the promise... which begs the question, does it even matter if someone promised something IN a relationship
Should promises be taken seriously in relationships?
Should promises be taken seriously in relationships?
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