How do you say aunt Michelle in Spanish?

To say, "I love you, auntie" in Spanish, you say, "Te amo, tía."

Here's a comparison:

English__________Spanish

I love___________yo amo

you love_________usted ama

he, she, it loves____el, ella, lo ama

we love__________nosotros amamos

you love__________ustedes aman

they love_________ellos aman

English uses two Words to conjugate 'to love': love, and loves. Spanish has seven! (I didn't include two other persons that English doesn't currently use, and one that Spanish barely uses.) Whereas you can be vague in English, you don't get the luxury to just say, "Love you, auntie" in Spanish. You have to be specific about WHO is doing the loving. In fact, it's pretty much a feature of ALL Spanish verbs.