When you feel like you're being strung along, do you confront or let it slow fade?

I confronted. Was thinking of just letting it fade away but I think I prefer to be assertive. Fading away means you're still leaving the door open for them to string you along. Here's what I sent her:

Hey *name*, I think you're interesting, enjoy spending time with you, and would like to see where this goes, but I honestly don't feel like my energy is matched. I understand that you've been really busy lately and it could just be that, but so have I. I've had fun on our dates but ultimately am looking for something serious, and so here's me making my intentions clear! If you're also looking for the same I'd like to know :)