I too don't have any friends; though you can say they are friends within classes/lab times but nothing like hanging out to do activities outside. I've failed the 2nd year of my degree, and now only recovering on my 4th year doing the 3rd year things.
I've got to meet a few people, but most of the time I even struggle to get acquaintances to talk to in lectures and classes. So most of the time, I sit alone; seeing others talk among each other happily makes me don't want to go to the lectures, but I realised I got to endure and maybe learn instead of skipping lectures and failing.
And having friends makes studying much easier, even if it is just one. Reminding each other of assignments, due dates, giving hints to each other and working together solve problem and to make notes.
I've made no new friends this year, maybe strengthened a bit with a few people I already know but that's it.