Dreaming of deceased friend

I had a really dear friend pass away in 2017. We both graduated in 2012. And we had not spoke probably since 2013-2014. Long story short, I met him when I was 13-14 years old! He was actually dating my sister but the moment he laid his eyes on me he fell in love with me. He broke up with my sister shortly after meeting me. I moved and we ended up in the same high school. We became inseparable best friends. He would ask to date me ALL THE TIME and I couldn’t. I always said to him “ I would but you dated and (had sex with) my sister and that’s weird to me”. He was there for me always, we would sit on his roof for hours in the late night/early hours talking and talking. I can say to this day that not a single human has looked at me the way Mitchell did. I can literally still see his eyes light up every time he saw me. We both graduated high school and got into some shitty toxic relationships and didn’t speak for years. The day I figured out he died I lost it. I was broken. I went to his funeral. I was broken why didn’t I reach out to him, I never got to say goodbye or tell him how much I loved him. A couple days after his death I had a dream I was standing next to a tree in the nowhere and he came up to me gave me a hug and kiss and said goodbye it felt so real. He is the only deceased close friend or even family that I’ve EVER dreamed about and still dream about. Last night I dreamed about him again and it happens once or twice a year. My dream was me being able to rewind time. I remember walking up to him and saying your going overdose I see it happening we have to stop it and I rewinded time and stopped it from happening. After he died in 2017 his girlfriend of 5 years contacted me, she told me he talked about me all the time. She was mad at me( which fresh wounds I know she was just upset about his death) but I had never met her. But she couldn’t stand me cause she said he talked about me all the time. I apologized and told her I hadn’t spoke to him since him and her started dating. Just wanted to get this off my chest. After I dream about him I’m so sad the next day. I feel like I have just seen him. I don’t know what dreams mean and I don’t know what they mean when dreaming about a deceased friend. Thanks for listening to my story