Motherless people do you dread Mother's Day coming up next month/Why are is family tells telling me to move on?

I do. I've hated Mother's Day since my mom was murdered. I can't stand my Mother's Day! Some of my friends tell me to remember the fun times I had with my mother. At least THEY have their mothers. I hate going on social media because everyone will be posting about their moms and posting photos with them. Like say, "My mom is the best mother ever!" "Fun with mother!" My family told me I need to move on and stop living in the past. I overheard my dad talking to my oldest cousin about me dwelling on the last. He was like, "She needs to let go. Her mother is dead. Gone. Finished. She gets angry and jealous when she sees people bonding with THEIR mthere and she needs to stop the jealously. I know it's normal to feel that way but she should be happy they have their moms still snf she should be happy of the wonderful years she had with hers. I told her, 'Look Icknow you miss your mom, but she is gone. She isn't coming back and once people are dead. They're dead. Once they go to heaven, they won't wanna come back to this cruel world. Stop dwelling over the past amd you need to focus on yourself and move over and take care of yoursel. Put your big girl pants and be a WOMAN.' She should know she isn't coming back. She always drags people down when they're trying to be happy and she gets upset that they are happy and she is still angry about four years ago. We all are still but we all moved on and that's what she needs to do. Let go of her mom.'"
I looked at my dad and he was like, "Yes, I'm taking about you missy. You need to move on and stop loving in the last." My cousin said, "Yep that's true. That's the truth."
I cant move on! I hate seeing people with their mothers. STOP HUGGING AND KISSING YOUR MOMS IN FRONT OF ME! My friends do that to me.