I am sorry you got hurt, both physically and emotionally!
I came on to say I have sometimes felt the same - if I am cooking and drop something on my foot or brush my arm on a scalding hot cooking pot for example (I am quite clumsy) and shriek/cry, both my daughter and my partner can sometimes be very underwhelming in their reaction, and it does upset me.
However, they are generally both loving people who I believe care for me, and I think they actually just think I overreact to minor instances (I can be quite melodramatic and sweary I guess, especially when cooking). I have come to accept that they are not genuinely indifferent as to my well-being - they just don't feel my kitchen accidents are that serious ..... (I may speak to both of them about it however, as it is something that has upset me in the past, and we do try to always work on our communication and be honest about what upsets us ....)
Anyway, I scarcely think this is relevant now OP, having read your update about how cold your partner always is. Clearly this is just another instance.
Depending on how you feel about him, I would be tempted to call it a day, I think. Not just over this, but because of the way you say he always is. If you do still love him, it is worth seeing if he is open to working on it. I do believe people can change for the better in relationships if they are committed to doing so - both my partner and I are living proof of that - but only if they really want to.
If you tell your partner what you have said here, obviously initially he may react defensively, but given time to think, if he is at all a good man he will feel awful he had hurt you and want to do better. If he doesn't the answer is clear, sadly.
I wish you luck whatever happens.