I made her melt?

Today I was with a girl I'm talking to, all day. We did a side hug, and she said the way I rubbed her shoulder made her melt. What does that mean?

For context, we also cuddled and held hands for the first time today... so we've gotten physical haha probably not something I'm overthinking, I just don't know what that means.
I made her melt?
Post Opinion