Hello, Coachllama!
I do not know whether or not what you described can be characterized as “normal.” I definitely can say, if I lost someone I loved more than any other in the world, my reaction would be similar to yours. I'm not sure my “relationship mourning” would last as long as yours will, that because I've had a lot of experience repressing my feelings (not the healthiest thing to do, by the way).
I suspect you will continue to mourn your loss for a while, how long is dependent on your personality, emotional makeup, life experience, external events, etc. You
may be able to hasten (not end) the process by distracting yourself with other people and activities. The less you're focusing on yourself, the fewer “hooks” the pain of mourning has to grasp.
May the sun of happiness rise again for you soon!
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My dog

mastered the "fetch" command. He would communicate he wanted something, and I would fetch it.