My dad and holiday for a month

Ok i am 17 and will probably will take a gap year. My dad who is an oppressive, pversensitive prat suggested going on holiday for a month during my gap year - just the two of us. I can do a week with my dad but the thing is he expects us to do everything together and is a bit of a cheap scate and so will get us to share a room ( maybe even a bed :( ). To give you a bit of a background on my dad (as objectively as possible) he had a bad childhood were both his parents died young and he had to learn everything himself. So i understand he is going to have some issues e.g. Commitment and talking about his feelings etc. but he also has major depression and hates his job. Therefore i often get shouted at and verbally abused e.g. You dont have the mental copacity to do something, you are fat/ugly/dum/ unlikeable/unloveable/mean/rude/ a little ****, you wonder why you have no friends, you will never find someone who loves you and if you do they will be a f-ing saint etc. my dad does a lot for me e.g. Takes me to a lot of sport fixtures and pays for school tuition but i dont think this should allow him to be rude to me whenever hehas a bad day (but i am not sure) ... Anyway my dad is extremely sensitive and can go off the rails at any moment (i got shouted at for peeling some potatoes too slow....) and doesnt tend to understand things which personally i think are obvious. I went on a school trip to a festival to do a theatre productionand we were up there for two weeks and my dad came to the festival and expected me to organise something for us both to do. Now thats fine but it is a school trip and why couldnt he have organised something for us to do?? Maybe i am being unfair... And then as i have mentioned earlier my dad suggested a months holiday. I will be 18 and dont particularly like my dad so i dont want to go on holiday with him. But how do i tell him this? I tried once before and it resulted in him shouting at me telling me i wasnt such a joy either and that he would rather go with his friends and that i can f*** off. He then said if i wanted to go on holiday with friends i would firstly have to get friends and then get the money to go on holiday :( Needless to say my confidence has been shot to pieces... Please help!!!!!

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