I am a uni freshman. Couple months ago meet some guys who i thought were cool to hang out.

Turns out they were pretty shit friends. Always disrespecting me and making fun of me. so I cut them out.

Thing is they live on the same floor in the dorm so i keep meeting them. And my roommate is still pretty chill them. so they keep coming in my room to meet with him.

Mostly I just act as if they don't exist and mind my own business.

What would be better way to deal with situation without losing frame ?