This morning I was hanging on my laptop when suddenly my charger stopped working out of nowhere. The LED lights up for about 5 sec before slowly closing when I unplug and plug it into the wall.

Thanks in advance (I bought this new charger a year ago so it's kinda fishy?!)

Sounds very dead to me, did you try another plug?

Yup and it does charge my computer (my roommate got the same laptop model as me) and when I try my plug on his laptop, doesn't work

So it charges yours but not his? Sounds like the issue is resolved then, just don't let him use your power brick.

I mean I tried another charger similar to mine and this one works on my computer but my charger doesn't work

then your charging brick is probably defective.