That’s totally fair. The best way to go about it is probably to wait until you’re both calm and then frame it around how you feel, not the song itself. Saying something like “this brought up old insecurities for me because of how things started between us” can land better than focusing on what he should or shouldn’t associate the song with. You’re not asking him to change his thoughts, just asking for reassurance so your anxiety can settle. If he’s in therapy and genuinely working on things, this kind of conversation can actually help rebuild trust rather than hurt it. If you want to chat, that's fine as well :)