Getting over someone you never officially dated

I had met this guy back in December and our connection was completely electric like out of this world incredible. We hung out all day at an event with mutual friends and went out for dinner after which was when i learned he was moving across the country a few weeks later for a job placement for 8 months. I tried to forget about him but he reached out and we decided to keep it going while he was away. But it got to a point where we were talking all day, every single day and late into the night. My feelings were getting so strong but with months left until we could give it a real shot in person. So we had a conversation and decided it was best to end. The hardest part for me getting over it is that I know we weren't comitted to each other but validating that my feelings were real. I find it easy to have relationships that are sexual in nature but this was purely emotional and was so special to me.Now, everytime I'm having a problem my immediate reaction is to want to talk to him about it because for those almost 5 months, he really did feel like my best friend. How do you deal with getting over intense almost relationships?