My Best Friend died on the 6th we buried him on Jan 15th his mom died on the 24th?

IMy best friend of all my life was murdered. I attended his funeral and gave his mom flowers she even placed a pic of him and I together in the obituary. She was sick but I guess her broken heart from the loss of her son ,ade her want to give up. So she died and her funeral is tomorrow. I am emotionally numb and will forever mourn my best friend we were inseperable and this just seems unreal. Should I go to his mom's funeral tomorrow and just endure another funeral within 2 weeks of eac other. This is my 1st experience with death of someone close. my neighbor also died the other day and my family found out my mentally ill uncle who was supposed to have a caretaker died 5 years ago with No family by his side because they couldn't find him