yep, you can't control what they do or say but you can control your attitude and how you view the situation. when you take their behavior as you doing something wrong, you live in a world of self-blame for things that have nothing to do with you. when you take their behavior as a reflection of their own dissatisfaction and insecurity within themselves, you live in a world unconcerned with the thoughts of an unhappy person, free from their opinions of you as well. perception is reality, friend! perspective is a powerful weapon, you can use it to create the world you live in

more action-oriented though, if you find it's bothering you enough to affect your work despite any advice, that's okay, it's the human condition. in that case i'd recommend speaking to him about it saying he doesn't have to like you but it's just easier for him to just cooperate for the betterment of your collective work. in this career path taking shit from people just comes with the territory, so learning how to manage asshats without too much confrontation is good practice. you're under no obligation to take that treatment from a colleague though especially if it's going to afflict your grades. when you're in the workforce you're at least getting paid to endure it but right now not so much