I’m so sorry to hear that you’ve lost your partner in such a terrible way. We have many supportive users here who have lost partners to various causes, and I hope it will help even a tiny bit to talk to them.
I’m not aware that we have any other users who’ve lost a partner to murder, but we do have two users called @Lindylou1 and @linzy1980 who have sadly both lost their sons to murder: Is anyone on here lost a child to murder?
my gentle son murdered
There is also an organisation called Support After Murder and Manslaughter, which has a helpline and online support. Find out more: https://www.samm.org.uk/support-for-the-bereaved.php