I cant stand my fat *** room mate!?

We don't really have nothing in common so we don't talk and i never went out of my way to find a connection to him because he doesn't seem remotely interesting in anyway and are both quiet so both never went out of our way to make friends even though at first he tried at little to talk to me. i think now we are starting to misunderstand each other, like he might thinks im talking about him and now feels the need to whisper behind my back to his friends as soon as i leave the room. Since day two i stopped liking him becuz i think i overheard him telling his parents that i was weird and that pissed me off becuz he is a fat piece of s*** and he has the nerve to talk about me, who did nothing wrong at that time. Im about 68% he was saying that which is really the reason i never wanted to make friends with him. I'm like the nicest person, i might not talk to you but when i do im polite and genuine and would never talk about someone behind their back and i felt like he was a b****, and how could you of all people be a b**** when your fat, you waddle when you walk, you look like a serial killer and you have the nerve to talk about your roomate on day two when i was being nice. I feel like, if anything i should be talking about him, he's the one that is too easy of a target but im not that type of perosn. It was downhill from then that made me dislike him and made me not what to talk to him if he was like that. Acting nice to you but then taking about you. Recently i feel like i'm always mishearing him talk about me, especially since his friend staying in our room, he felt the need to do it all the time. When i leave the room im about 69% sure for at least 70% of the time and its driving me insane because im not 100% sure so i feel bad to dislike him and saying thats he a --------- in my head for somethings i could be wrong about but then i get mad at myself for ignoring it and acting like i didn't hear him whispering when i left when he looks literally like a fat hog when he's sleeping and im letting somelike that whisper sh** about me? He looks like a And i understand i deserve some of it at times because i do stay up late to finish work (since that's when i can focus) but i leave the room and try to come back as quiet as i possible, trying my hardest not to wake him up. I know i do things that annoy him like whenever he starts to chew really loud, i look at him and look away so he could stop or when im sleeping and he comes in the room with food that wakes me up, i also look at him, which im trying to stop but i try to work on flaws that i have. He's annoying as well like he use to always master-bate at night and smell up our whole room EVERYNIGHT. I'll come in and it smells like spit and white ***. He smokes in our room sometimes and the way he talks is annoying, he always lets out a deep breath of "Huh? whenever he's talking to someone like he's annoyed with them and does that every-time. If it was me talking on the other line, i swear i would curse hes *** out because he does it eveytime. (Its hello, then deep sigh deep ) followed by uh huh, uh huh---- EVERYTIME he's having a phone converstation, it always like that. Well i guess my question is what should i do, keep ignoring what i believe is him whispering behind my back and just think that im need too because im not 100% sure and stop think bad thought of him like hes a fat *** b*** since or should i start whispering thats he a fat b**** or whatever at different times.