Dream About Friend Disappearing

For the longest time I had a friend and we were inseparable until one day they just stopped contacting me...and never did so again. Then I was blocked on practically everything and I didn't notice until I looked them up on Google. I tried interacting with their siblings as to what happened but was never given an answer. I keep having dreams lately of them coming back and trying to explain themselves and I think it's just me trying to process letting go of them but I also feel as though I need some closure, as they left one day without a reasoning and when I've tried contacting those siblings I either got no response or they acted like they didn't know what I was talking about. I just wish I had an answer....it's been nearly 2 years since they contacted me and I think about them often yet haven't heard a word from them. At one point I decided to contact their siblings saying it would be the last time I do so as I felt I was being somewhat obsessive but I genuinely think it's just that I want an answer. Even if we don't start being friends again I just wish I knew why they left.