That instant spark can feel convincing, but chemistry alone does not prove a relationship has depth. The real way to tell if it is love or lust is to watch what survives when the rush slows down.
Lust is not fake. It is a real, powerful sexual pull. Therapist Sherry Benton, PhD, puts it plainly: “Lust is purely wanting sexual contact.” She adds, “This is largely selfish with little thought or regard for the other person’s well-being.” Translation: if the connection mostly lives in the body, but disappears when conversation, conflict, or real-life needs show up, it may be desire wearing love’s outfit.
Love asks for more. Psychologist Robert J. Sternberg’s triangular theory says love includes intimacy, passion, and decision/commitment. In his words, “The basic idea is that love has three components: intimacy, passion, and commitment.” That matters because passion can start the story, but intimacy and commitment decide whether it has chapters.
The body can even give clues. A University of Chicago study found that people tended to look more at the face when they felt romantic love, while sexual desire pulled attention toward the body. Lead author Stephanie Cacioppo said eye-gaze patterns may “differentiate feelings of love from feelings of desire toward strangers.”
Here is the unique test: ask what you want when sex is off the table. Erica F. Zajac, LCSW, says, “The best indicator is that feelings of love will come from an emotional place.” If you still want dinner, errands, hard talks, boring Sundays, accountability, and future plans, love may be building. If the interest fades without access, attention, or fantasy, that spark may be lust doing a very convincing audition.
And no, lust is not the villain. Experts note lust and love can coexist, especially when attraction grows into trust, openness, and care. The red flag is not desire. The red flag is confusing desire with devotion before someone has shown consistency.
Bottom line: Lust says, “I want you right now.” Love says, “I care who you are when nobody is performing.” The difference usually shows up after the butterflies stop doing all the talking.
