Ach Ghazi18 what a horrible thing that happened, i am so sorry... I agree with others that it might be wise to take all the time you need, all the time it takes to process this and allow yourself to grieve in any way you need to. From my experience, i can tell you that i also wanted the somehow abstract grieving process to be over with as fast as possible, don't let myself feel the pain, force myself to only focus on moving forward. However, that proved an unwise strategy and at a later stage it caught up with me of course. At the time i really wanted to be "strong" and "tough" only to realize (learn) later that to be strong means very much to allow yourself to be vulnerable, to self and to others. To be able to actually say to yourself out loud (and to others), yes, i feel pain and hurt (i am not in control) and i am out of my wits about the situation and that it is okay to allow yourself to feel these types of emotions without any judgment eventually led to allowing myself to heal. Also crying is cleansing i found. I think for me that meant being gentle for myself.
I just wanted to add that what also helped me very much was to just sit and allow myself to feel where in my body i could feel specific emotions, aches and pains, strange vibrations etc. and while just sitting in a mild meditative state, images and such came up in my mind connecting an ache in a specific body part to a specific situation. By doing this regularly i came to deep insights about the relationships concerned, my role in them etc. and so over time, by allowing the body to speak so to say and me to listen in a sort of symbiosis i was ready and able to release hurt, pain etc. and be at peace with it. So, getting more in touch with the body and my emotions and by reading tons of material about it and thinking about it to gain a better understanding of identifying a lesson and its meaning and how to grow from it moving forward to a better and more complete version of self.
Happy that you have a support system there, I wish you all the love, strength, courage and wisdom to get through this.