I am so so sorry. 
Don’t be strong for everyone. You owe it to yourself to have your own grief. If others can’t handle it, tough! If it brings up issues that block your grieving, go do it with a therapist/counselor/friend/whatever. But do it. It is the way of humanity and growth.
My father died 7 years ago, just short of his 78th birthday. I still miss him! I have so many questions, so many things to tell him and share with him. Why didn’t I do this all sooner? :smack: Of course, we all ask that. We never have enough time.
Over time, the shock and unreality of his death have gone away. I still sometimes find myself being amazed that he is not here. The undeniable fact of his death has filled my life with sadness, awe, and also a certain resolution to seize the time and the day.
Losing someone you love hurts more than I can describe. The feeling I get is something having punched a hole straight through my body. Over time, the pain is like a scar or a sore knee; it never goes away, but you don’t feel it constantly. As long as you are alive, life keeps happening, and you move forward. You don’t set aside your love or your pain, and you don’t forget, but you make it part of yourself.
Scars don’t always have to burn. Sometimes you can look at them with fondness, and see them as souvenirs of joyous times. With luck and effort, you can use your memories to keep your mother’s memory alive, to become her best parts and show them to the world. In that sense, she truly becomes immortal.
A friend of mine once assured me that I would see my father again someday. Perhaps. I would love to, but I don’t need to. I sense his presence around me, telling me to be my best and let go of my worst, and above all not let my loss destroy my life. He tells me to let go of my needing him, and by doing that he will always be with me.