I don't think the Lovers is a choice as in a selection or mechanically pick an option.
It's more of a decision to do something/live according to what truly resonates with your core (or soul). I think the Lovers is a magnetic pull that draws the querent towards something, be it a thought, belief, value framework, person, situation or job. It's "falling in love" with something or someone because it simply feels right, fits the best, resonates the most.
However, this doesn't mean that the gut feeling is always correct and that's why the Devil is associated with the Lovers. Is the magnetic pull born from egoistic reasons, such as fear, lust, selfishness, codependency, pride etc.? If yes, it's more about the Devil than the authentic, genuine Lovers.
In relationships, this card doesn't necessarily promise happily ever after, because it can mean for example:
- one person being sure about the decision but the other one not
- the pair having to decide whether it's really authentic or born from selfish reasons
- the pair acknowledging that the magnetic pull is there, but they can't make it work in practice for myriads of reasons.