I hope you don't give up the opportunity to study in college. Now that your father has been diagnosed with the disease, this is an unchangeable fact. You can only comfort your father with your strength and good study. Now the traffic is very developed, and the high-speed rail basically covers the whole country. Although the ticket cost is high, the price is much smaller than the price you pay for giving up your studies.
In addition, telephone video can also let you meet every day. Before going to school, you can install software with video function such as WeChat and qq on your parents' mobile phones, and have a video when you have time at school. When your father is seriously ill, you can tell the counselor and ask for leave to come back.