How do you know if you are in love with someone or if you are simply infatuated?

I feel like the two emotions can feel almost identical to each other. To me, the only difference is that infatuation usually does not last as long and is not as dominant of an emotion. Love usually tends to last a lot longer and creates a stronger chemical and emotional connection between the two individuals. Infatuation always fades in the end. Even if not right away. Love can often stand the test of time itself.