What do I do?

My fiancee has started acting like hes got a mental illness, his mom has mental illness problmes and like now hes started acting the way she acts anyways ive been doing online cles and making A's and my finacee who is going to the same college was making A's too but now is not and is acting very jealous towards me about it, also he decided to say to me tonight that I stay sick all of the time and thats not the case I have a lung disease but it doesnt bother me but maybe a few times a month he however has diabetes and he is the one who is always going on about how he doesnt feel well, also i feel that sometimes he keep me from doing some of the things I would like to do and that he orders me around and its about to stop, ive wanted to open up a mini avon store and just havent had the motivation and i decided that im just going to do it and like he gripes about me cleaning but when I clean it he messes it back up and refuses to help me how can i show him whos boss, he is nice sometime