He is! There is a banter with Cole about the breakup. Maybe you caught the banter bug?
Sera also has a comment, but it... might not be what you'll want to hear.
I've heard the banter from Cole on YouTube, but it seemed more about Solas' pain than my Inquisitor's. It's not a moment of Cole trying to help ease her pain or anything like that.
And yeah, I got a comment from Sera, but it was entirely about the vallaslin and nothing about the breakup. If you ask her what she thinks about Solas, she still makes the "elven glory" comment, even after he dumps you. Also, Cassandra kept repeating banter to Solas about the vallaslin, in which he tells her he'd rather not talk about it as it was done in a private moment. Unfortunately, yet again, it's about Solas and not the PC. I wanted to respond to that banter so badly, especially after I got it for the fifth time!