idk how to comfort him...

me and my boyfriend of almost 2 years are now in a long distance relationship.. so that puts enough distance between us emotionally.. it’s hard for us to console each other through every day stress because we aren’t physically with eachother. we have enough trust and communication skills to keep us going, otherwise we wouldn’t have chosen to continue our relationship while being states away from eachother..... well anyways, his dads lung cancer came back recently (about a few months ago) and he just told me it’s stage 4 lung cancer and he will die soon. we have been very distant from eachother lately and now i feel absolutely horrible after hearing the news about his dad... i don’t know what to do. i don’t how to be there for him the way he wants me to... i need your help girls !