If you are with the Right One, it is called ‘Immersion’.
If you are with the wrong one, and not even prepared to see that you are with the wrong one, it is called ‘attachment’.
It is called ‘attachment’ because the two of you would anyway never be able to fully unite.
You can atmost be attached to each other.
‘Attachment’ is superficial union.
‘Immersion’ is when there is Yoga, when there is dissolution, when the two are lost.
When the two are lost into the One that is neither of the two.