Sometimes we might incorrectly think that physical excitement--such as sweating or a pounding heart from exercise or caffeine or media stimulation--is signaling the sensations of love. in such a case, the "feeling of love" that hits us suddenly might actually be a case of:

Misattribution of arousal 

Misattribution of arousal refers to the phenomenon when an individual mislabels the actual cause of arousal they experience. For instance, if an individual has consumed too much caffeine, he or she might experience physiological arousal (increased heart rate, sweaty palms, etc.), and attribute the arousal to romantic feelings. Similarly, if a person is physiologically aroused by fear or exercise, he/she might make an error in labeling the source of his/her arousal.