Dad was so lonely that he was single for ten years.

First of all, you can consider dad's personal problems, which shows that you care about him. Have you analyzed the reason why dad has been single? Personally, I am worried about you to a great extent. But now that you are in college, and you still have a salary, you don't have to worry about your father. Then it's time to solve your dad's personal problems.

Your father must be very lonely at home when you are studying abroad. You should encourage him to find a wife, spend more time with him and take care of him, so that you don't have to worry about dad's life alone. You know, it's easy to be lonely when you're old, and he'll be even more frustrated if you're not with him at school.

You are so old, you will definitely not be abused. Your father can be single for you for so long because he is afraid that you will be abused. If you are abused now, your father will be the first to object.