First semester of second year is/was easily the worst part of my degree. I literally sat there questioning whether or not I was suited to the course and whether I was even capable, which was a first for me. So yes, it may well get worse again before it gets better. Do you get a reading week or any breaks during autumn? I had a straight 12-week semester, and got ill a few weeks in so I just fell behind a bit, and never really caught up to a point I was satisfied. Christmas was good though, because it gave me time to get on top of things and sort myself out a bit. If you get a week in the middle then do use it to properly relax, or sort yourself out, or do something just to stop it piling up.
You need to inform your tutor when you start back. Can't see the future, but if this does get worse or so then they need to know. If and when things get better if at the end of the day you're on a borderline grade the supporting information around dips in performance can be taken into consideration. Mainly though, so they can try to find ways to support you. If university is the source of your unhappiness then they have a duty to guide you.
Ask for help. Do it everyday if you need to. Take a problem to a tutor after a lecture, or take every opportunity to ask if you have seminars or tutorials. When you feel you struggle, it sucks; it genuinely makes everything else worse. If you felt you were doing well you'd have a much more positive outlook - and if this looks to be one of the major causes of this then it needs to be targeted.
Time is a grand healer for the infatuation. It won't make you forget, or make it go away, but eventually it will stop plaguing you. Every situation is different, so you just gotta do your best to avoid dwelling on it. Do you actually know them? 'Cause this is the modern day, it's not too difficult to find someone on the internet. Friends in common etc. may have a way of contacting them, as a thought.
Have you tried looking for somewhere new to live? Right now, you're uncomfortable there, and you're unlikely to become best of friends if they predominantly speak in their native language. You don't have to rush into a decision - take time to meet people who have a spare room going (someone will have failed etc.) and just work out if you would be happier living with them. People who are on the same, or similar courses may be ideal because they will have similar workloads. It's something you can do to improve the situation.
Take it day by day
if all of this has realised it's not what you want to do then do speak to your tutor. Dropping out is a potential option, and/or there's the potential to change universities/courses still with funding available for a three-year course. Would give you time to sort yourself out and clear your head.
Most of my friends have graduated this year, and a lot of them basically hated it. It's perfectly normal to be disenchanted with it all.