I've had luck with a bath ritual. Helped me when I lost several beloved pets and a loss of friendship.
Light a candle if you want. Take a bath and as you soak, let the water take away your grief or at least lessen it. When you drain the tub, see the grief draining down the drain. You may have to do this a few times if your grief is really really deep. If you're not into baths or can't have one, try doing the same thing with a shower. Imagine the shower water carrying away your grief down the drain.
Hopefully that'll help or give you some ideas :)