I don't think that "right" is a good word here. The feelings are there and need to be dealt with. My personal strategy to date has been to bury pain and try to move on, usually prefaced by telling myself I didn't have the "right" to feel what I was feeling, or some variation thereof. This strategy has not been very successful so far. The stuff comes back out and plays anyway. Talk to people here if you need to. Work it out. But please, for your own sake, don't try to bury the grief you feel.