Welcome & sorry.
I am still quite new. My father too was diagnosed with NSLC this year in June. Luckily I only lived 20 miles from him and in the beginning could come and go quite alot - its so much to take in and understand and I think crying is all part and parcel of it. I have since moved home to help him and my mother. All i can say is at the m,oment I am still very upset and haven't found that it gets much better but you have to forget about that, stop worrying about you and how this has made you feel and put all your energy into helping him get better and making him happy and as comfortable as possible. Also keep positive no matter what stay positive!