English is not my first language so I apologise for mistakes.
I (18F) believe I have to start with some backstory. My dad (64M) has been a fun dad, until something or someone didn't match his expectation. He used to get really angry, scream and hurt me physically since i was barely 2 years old. It was't that often, maybe twice a year, but it was always such a dramatic experience. He would shout at me about how im not going to able to sit for a week, that he'll give me a proper reason to cry etc. He did this till I was 10 years old. When I was 11, he also hurt my mum and I saw most of it. Later i found out it was the second time he did it, first was when I was 5. He never admited guilt. I am deeply traumatised by this and by other things. Just so you understand why we're not so close.
About a year ago my psychiatrist prescribed me a new antidepressant that among other things, made me gain weight very quickly. It has happened to me before and I managed to lose all of it. I now don't feel so good in my body (I have about 30 kg more than i should) and want to slowly change my habits.
Now, I've mentioned this in front of him once (since we still live in the same apartment and are after many years on speking terms) and he said he will help. But I think he took it too far. He bought a book called restarting your eating habits, which seemed nice at first. He also bought some healthy food (which he never does), planned some healthy meals for me and helped me make them. Still nice. But then I was in my room in my bed, which he knows I'm not comfortable with him going in, because after all the stuff in the past I still don't feel quite at ease around him, and my bed is one place I want to feel absolutely safe a comfortable. So he came in with a proud look on his face, came right to my bed, showed me a picture on his phone, which was a 3 year old picture of me and him in our bathing suits when I was skinny, and said and i quote "We're going to get this Claire back." He did not understand why it made me uncomfortable. Later he acted like nothing happened.
He also forbade me from eating any sugar and made me weight myself in front of him and he wrote it in his diary. He wants to weight me every week and arguments about my cycle changing my weight althroughout the month didn't take seriously. I'm not comfortable with this. He also bad talked my mum about this being her fault (it always is in his eyes). It's always nothing or everything with him and I feel like he thinks of himself as my saviour now. When I confronted him about me feeling like he cares about my weight more than me, he told me he couldn't give less shit about it (his words) and he just tried to help. But I feel like I'm in a psych ward again and everything is decided for me. He told me in the morning he will weight me in the evening as well. Huge stress for me.
I know I kinda asked for help but I never asked to be treated like a different person from my skinny self. So AITAH?