<human>: Can you give me the gist of the text in a nutshell?

I graduated last May which caused problems in our relationship because my SO expected our relationship to have a time limit. Our relationship gained footing again because he voiced to me that he is willing to "follow me anywhere". Since then he took back that statement to say he would only stay in CA. 

I got into graduate school in CA but I also got into a much better one in MD, so I believe I will be going to MD. I have 9 more months in CA and am having a hard time accepting that I will be moving across the country. My SO says it will all work out but I feel betrayed that I continued this relationship thinking that he would join me on my educational path (he is a computer programmer so finding a job for him won't be too difficult).

 I'm wondering if I should continue this relationship with him or if I should enjoy my time here solely concentrating on myself and my big move ahead. I think a long distance relationship is unlikely too because he has voiced his distaste for them (yet can I believe things that he has previously said?).

 I don't know how to talk to him about it because he just keeps saying this will work out, yet it causes me much stress thinking about my situation and being unsure of what will happen. How should I communicate with him my concerns? How can I still be friendly with him once I leave but mutually be supportive of our future lovers. I had been able to see my self with my SO for years to come, but from my perspective right now that seems impossible. If we stay together, or open relationship, or break up what are the possible outcomes on our relationship? How do I grieve leaving someone, though it is to better my life?
<bot>: What is the next step in my 1.5 year relationship if I am leaving in 9 months? Any advise in what to do with the grief that I feel?