There is no "should be over it by now."
Your dad died a year ago and you still pull up his number in your phone sometimes. Your buddy passed and you still expect to see him at the bar. The divorce was final months ago and it still hits you at random moments, like getting gut-punched by a memory.
That's normal. Grief doesn't have an expiration date, and the people who tell you to "move on" have either never lost anything important or they're doing the same thing you are and just hiding it better.
The problem isn't that you're still grieving. The problem is when grief goes underground and starts coming out as insomnia, anger, drinking, or a depression you can't name. That's unprocessed grief, and it's patient enough to wait but heavy enough to sink you.
If something's been off since the loss, it might be time to talk to someone.