I lost my best friend last year when he moved to Chicago because he got accepted into a master's program, and he made me feel like our friendship meant nothing since he was going on to do bigger and better things. 
That can be pretty hard to swallow, do you stay in touch? It's easier these days with the likes of social media. How do you fill that void?
We don't really stay in touch anymore. He and his fiance invited me to their wedding, though. He's not a social media person, and I'm not either, so we've basically lost touch. I haven't filled the void, unfortunately, but I feel okay about it now. 
That's such a shame, we grieve any kind of loss, I suppose. Perhaps the wedding would bring you closer together?
Maybe it will. I'm not sure, but I feel more happy for him now than I do envious and hurt. So, whatever happens, happens. It's okay. 
I hope it works out for you, life is too short. Fill your life with wonderful things and wonderful things will surely happen.