sounds like burn out to me... i tend to play when there is a new release for a month or 2 then i leave it alone until next release. My recommendation would be to find a decent clan that makes playing the game a more social experience instead of a grind. I recently found a decent group of people to play with and they are the only reason i am still playing. Destiny solo sucks, and if you're no longer raiding i can totally understand how you would get burnt out. Go play something else for a bit then come back re-energized!