Pfff dude, why didn't you bring up that info before! That's the reason: you're both in the same profession, you're either doing better than him, or you remind him of a colleague who is doing better than him. Basically, you're paying for his own massive insecurity, and that is plain wrong.

I'll be honest, when people here post about others being mean/rude for no reason, I tend to give the bully, the benefit of doubt, because the OP might be omitting their own crazy behavior to appear as victims and gain the reader's favor. Generally, you can see through the bullshit, when they talk, as they never want to assume responsibility for anything and have the self awareness of a dry sponge. So I went to check your other posts, and you don't give me that vibe, yet there must be a reason why your roommate is so... salty. Knowing that reason is powerful, because you can give a proper rebuttal when he comes with his bullshit; and now we know it.

You're somehow bruising his ego, just by being you, and I'm sure the profession plays a huge part in this. Now, you can deal with this in different manners, but truth is there's nothing you can do to solve it entirely other than moving out, because it's his problem with you. It's not you who is at fault and needs to change, it's him who needs to get over himself and grow up.

If you don't really want to leave now, you need to be assertive and tell him so. Don't be aggressive, but be direct, serious and firm. Forget about trying to be nice and polite, he doesn't respect you and every time you want to explain things, he turns your non-confrontational approach into "weakness", because he needs you to be lesser than him to soothe his ego. This is why he tries to make you feel shitty, and say things like you're "socially awkward", he's trying to make you be like you're faulty, because that's how he can cope with his bruised ego.

If you can live in that environment, without wasting a lot of emotional energy battling this dumbfuck, by all means, stay; otherwise it's not worth it, bro, move out and on. But do stand firm and be more assertive, when he comes with this bullshit.