Emotion is singular. It varies in intensity only. The labels and polarity we ascribe are purely subjective.
It is up to you, through introspection, reflection and brutal honesty to determine why you feel. How or what are misleading questions.
Working through emotion is a process, a complex looping internal narrative. It is ill-served by glib single-word assessments such as love, hate, jealousy or envy.
More importantly, although you may feel intense emotion because of another human, it is your emotion; you are responsible for it, not them.