I 20M don't know why I feel the need to control my 21M fiance

I've been together with my fiance for 2 years and we're recently engaged and for some reason I think I wanna control his life and I hate it. I think this started when he majorly broke my trust half a year into the relationship. that day he had some friends over and they brought latex full body suits and masks and a whole of of kinky latex stuff to try out. he never told me beforehand and that thats what they were gonna do, he got naked and put on a full body suit and a mask everything they brought. after they did it he just send me a picture of him having it on and saying how he tried it out and liked it and I felt so heartbroken and so much rage. I hated it so much and I still do so much every time I just see anything related to that, that I get a physical reaction. they didn't have sex I know that for sure. my fiance is autistic and never had a relationship before me. in his head anything sexual is just sexual if he does it with me, in his mind it's not inherently sexual to let someone tie you to a bed or put on latex masks. after that happened I told him how hurt I was and how much I hated it and how broken I am and he said he was so sorry and that he didn't think it would be a problem and apologized so much. I still loved him and still do love him so much and he does too. he worked a lot to understand my boundaries and I talked a lot about what is okay and what isn't. but now I feel like I'm abusing that, i sometimes catch myself being scared that something like that will happen again even tho I know we've worked through this and it won't. but it's getting to a point where I hate myself for feeling scared and controlling like this, I always have a weird feeling when he goes out with his friends without me. I've tried to stop him from attending a CSD cause of my controlling behavior. I've told him what he can and can't wear and tonight I was playing a game with him and his friends and told him to not stay awake too late and now in the morning I see he has been online till 8 am and I don't know why I dislike that, why I dislike that he changed his profile picture tonight. I hate that I have the urge to be everywhere he is and watch if everything goes accordingly. What is wrong with me, I despise myself so much for being like this and I want to change that, I want to love him and not worry about him. I don't want to feel my heart sink just cause he has a new profile picture or he did something with his friends. can anyone tell me what I should do? or what is wrong with me? I want to make this love work and I'm willing to do so much but I just don't know where to start.