Saying goodbye to loved ones is never easy. It hurts and there's no way around it.
I think sometimes we put too much pressure on ourselves looking for "closure." I'm not sure when seemingly everybody started using that word, it just happened one day. You don't close the book on the ones you love, you move on to the next chapter.
This is an important realization. We try to fill voids in our life with all types of things. At best, they are loving distractions. At worst, they are actually compounding our problems at our lowest times. Regardless of which it is, we are only delaying the inevitable; we will eventually have to deal with the actual issue.
Kris, I think you've only begun to tap into the strength you are capable of. Hang in there, better days are ahead.