<human>: Could you distill the essence of the text into 1-3 sentences?

I'm 23/F and I've been working very hard for several years towards a pretty specific job in the games industry. I have strong expertise, a great professional network and recently I even found a Master's degree perfectly tailored to my career plan.

This summer, around the time I was accepted onto the course, I met a 21/M guy online who started playing Overwatch with me and my friends. Since then, he has somehow moved to my city, joined my (niche) course and now tells people he wants to do the same (niche) job as me, despite having zero experience in the area and lacking any seriousness or ambition whatsoever. He doesn't pay attention in class, moans about assignments and has even started cockblocking me when I try to socialize with the other students.

The situation is super uncomfortable for me because this course is meant to be a new beginning, full of social and professional opportunities, but now I feel like some deadbeat stranger from the internet is leeching off me and the future I've created for myself. I can't stop him from copying me, but damn, I don't want him to drag me down.
<bot>: A random guy from the internet has moved to my city, joined my course and copied my specific career choices out of nowhere.