Of course he wants to "fix it". It is pain, it is dreadful, agony, hollowness, sorrow, it cuts right deep to the Soul foundations. He wants to help you feel better. He will be probably managing to shut out the worst of these agonizing emotions, although he will also be grieving but in a totally different way..... I know -"men are from Mars, women are from Venus".....
He's trying his best. Try if you can to have unconditional love for that, and him. Don't let the pain put a wedge between you. Accept that you are both approaching this loss of a loved one in a different way. Just hold him, without words. Give him a big hug. Try to lie together in bed in silence, with love and a shared sorrow. That's what an animal would do.
That's the thing with our beloved animal Souls. The don't use words. It's easier to share love when you don't. A glance from gentle eyes....a kiss....a nudge with the nose, a warm glow, a paw on a hand, the way they lean against your legs....a sigh. All speak volumes. And take us onto levels where human personalities aren't accustomed to going. Forget the personality-thing. Reach out to your husband's Soul.
But if words have to come into it, tell him you are feeling a lot of painful emotions right now, but they will heal, given time, and in your own way, that you love him, that you can see the help he is giving, and appreciate it, but you will need time to fully grieve and heal. And that you can't help it. Thank him and honour him for his trying to help and protect you.
And tell him you are there for him, that the feelings show differently with each of you but you know he is grieving too -in his own way and in his own time (and that may be shorter, or longer, than yours)
You will both miss her, probably always. But as time goes by you will both be able to cope better, though expect there will always be "melt-downs" sometimes. There are with me.