Here's one question that can reveal more about a relationship than a hundred tests:
"If I knew for certain this person would never leave me, how would my behavior change?"
Would you be less jealous?
Check less?
Need less reassurance?
Give them more freedom?
If yes, some of what you call love may actually be fear of loss.
Love says: "Be yourself."
Fear says: "Be the way I need you to be so I can feel safe."
Both can exist at the same time.
The first freedom is learning to tell their voices apart.

