My boyfriend (M25) and I (F21) have a long distance relationship. We see each other almost every weekend. For various reasons (among them: I have roommates and he lives alone) I go to his place more often than he comes to visit me, and I also spend my semester breaks at his flat while I'm working. We agreed that I don't pay rent when I'm there as he is working a well paid full time job and I'm still in college. 

I have stored about one third of my clothes at his place, so that I don't have to move them around all the time. Out of the seven shelves in his wardrobe, two are mine, plus one out of four drawers. As a result of this, my clothes are in his laundry as well. And as he lives in his flat "full time", he also does laundry more often than I do. I will sometimes do it too though, especially when I'm there for semester breaks or longer weekends. Whenever I do our laundry, I treat all our clothes the same: I wash, hang, fold and sort in all of my and his clothes equally. He does so as well, except for the last step. He will fold my clothes, then stack them all together randomly (so, for example, first a tshirt, then socks, then pants, then a dress...) and puts that stack on my shelf as it is. I have offered him multiple times to have some of his clothes stored at my place as well, but he said no to that. If he had clothes stored at my place though, It'd never come to my mind to treat them any differently than my own stuff. 

As a result, as soon as I come over to his place, I have to sort in all my clothes to the correct pile. It's not like I have a lot of different piles, just 8 different piles for different type of clothing, and the drawer for underwear and socks. It's not rocket science to figure out that tshirts should be on the tshirt pile, pants on the pants pile and so on. For me, having to sort them myself seems like an unnecessary addition of steps as he puts my clothes in the wardrobe anyway, and I don't think that sorting them before is much of an issue. I also don't care if he placed items on the "wrong" pile or something. The whole thing makes me feel a bit like I'm not welcome to his flat each time I have to sort my clothes. As his flat has somewhat become my home base (I'm not really getting along with my parents atm), this always feels like a little stab and a "hehe, see, it's still MY flat, and MY flat alone!", and as if he doesn't want me to store my stuff at his place and, thus, live with him. When I told him how I feel about it, he said I'm overreacting. 

His arguments for doing as he does are the following: 
1) He doesn't know which pile is the correct one for which item, and he doesn't want to learn it either. 
2) He's not my housekeeper. 
3) I should be grateful that he's even doing my laundry. If I don't like the way he does it, I can do my laundry myself at any time. 

My boyfriend has proofread this and is okay with how I described the situation. So now tell us, reddit, who of us is the asshole? 