There are types of therapy that specifically work with grief (ranging from woo-woo to clinical). I think they are worth looking in to if you are debilitated by grief. Yes, taking time to process tragic/traumatic events is normal, but you should not forfeit the rest of your life to them. Not to be "that guy", but on the more adventurous (and imo more effective) side of things is ayahuasca, kambo, mdma, and/or mushrooms.