Why does it seem like most “relationships” are just two people consistently being intimate with one another but there’s no real commitment?

Like you will go to sleep together. Wake up together. Y’all have dinner together. Y’all have breakfast together. You’re around each others kids. You’re going to family functions etc etc but yet it still feels like they have you but you don’t have them. Almost like all those things aren’t for the both of you but just them. It doesn’t seem like a two way streak. You feel like they’re still searching and if given the opportunity by someone else outside the relationship, they would test that opportunity even though it comes off as though you two are in an actual relationship.

Why does it seem like most “relationships” are just two people consistently being intimate with one another but there’s no real commitment?
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