Looks like something a little kid could say, then and a proud cheesy parent would tattoo.

I would translate this by "If I made you sad by telling you you made me sad, let me know".

I imagine a little kid saying "You made me sad", a parent crying because that must be a terrible feeling, and the little kid being sad by seeing their parent sad. Something like that.

To be honest, I got a feeling I could be stupidly moved enough to tattoo that.