Thanks for taking the time to write, ((((((((((((((( everyone ))))))))))))))))). I hope nobody minds that I thank you all collectively rather than individually. I appreciate your suggestions and support nonetheless.
Some of you have suggested that another person be present when I tell my dad about what's been going on. The problem with that is that there *is* nobody, or at least, nobody who is not impartial. We are a close-knit family and less than five family members keep in contact, and my dad has very few friends, and none visit the house at all regularly. I visited a counsellor regularly at university but kept it secret from him, so there is no way that things could be explained in that way.
The dr suggestion Kimmy made is very good, and I wish it could be done. But the problem is that in the UK, you have to be dying (more or less literally) for a dr to make a home visit, and I hardly know my dr at all anyway, it's not like he's an old friend.
The idea I like the most is writing the letter, especially since I have a great tendency to forget what I mean to say and forget my arguments when I'm talking with him, because I get nervous... and he's also pretty logical, so if I ever do score on an argument, he uses something else I'm not very strong on to argue his point. I'm not very good at arguing with him, I fall to pieces, so writing a letter would be the safest thing to do. But oh, returning to the house knowing that he has read it will be nerve-racking

.
It has to be soon, though. He said that if I hadn't heard from my university by September, I should contact them. Of course they have been in contact with me, but he doesn't know that. It's going to have to be soon

.