My Best Friend Died in a Motorcycle Accident

First time posting here. I needed to vent. This year I met someone with such infectious energy. We ended up talking on the phone every night, until one of us fell asleep. He encouraged me to get out of the house more. I had become a real shut in and he broke me out of my shell. He passed away last month. A car ran a stop sign and hit him while he was on his motorcycle. I threw up when I called his phone and his stepmom answered the phone to tell me the news. The funeral was a month ago. I am struggling not to go back to being shut in again and I am smiling around my friends and family when I visit with them. Yesterday I was playing the guitar, and ended up writing a song for him, crying. I realized that this hit me harder than I realized. This impacted me so much. I am trying to celebrate him but this mourning is unlike any other I have gone through. It feels like time was stolen from us. I don't talk on the phone with anyone for hours anymore. I feel so lonely without him.