Dating

Shall I message him?

Had a row with the guy I've been with for nearly a year. Anyway, it was heated and horrible things were said from both sides. He hasn't contacted me and I haven't spoken to him since.
I personally would like to understand his perspective to learn from this. But I'd also like some closure.
I had real feelings for him and I felt the same from him, however the silence is too much.
Is it a bad idea if I reach out?
I don't even know what to say... maybe something like 'can we talk?'.
I'm overthinking, imagining he hates me, but I don't want things to be sour as our last interaction
Shall I message him?
Post Opinion