How do you know when you love a person? When you think about them constantly? That's called infatuation, or obsession. When you bring out the best in each other? That's definitely a good thing. But at what point does a crush turn to love?
when your motivation for visiting changes from selfish interest to
selfless caring for the other person. When you would stop seeing them
if they didn't want to see you, not because you were offended, but
because you wanted that person to be happy.