Help for lung cancer patient

Hello, my dad has lung cancer. I don't know who to talk to or what to think and so I hoped someone on here might be able to help me.i am just devastated. We are so close and I just can't imagine my life without him. he has been diagnosed with stage 2 lung cancer in the apical segment of the lower right lobe. they are guessing it is stage 2 as the hilar lymph nodes are borderline/prominent (I don't know what this means) and do they won't know until surgery whether they are cancerous or not. my dad is 68 and has been symptomless except for some weight loss. He does have moderate copd from years of smoking. i can't stop crying and know I need to pull myself together to be strong for him.