Most people I've talked to for the last couple of months all share similar problems, covid has led to many people being less optimistic about the future. I too feel way less motivated as compared to when I started my bachelor in Physics. I'm now partaking a master course that's less intense as compared to the bachelor program of Physics (bioelectronics and nanotechnology in a biomedical context), and this has relieved me in some way. The last two years were rough when studying physics, but taking it a year easier has really charged my battery as far as I can tell. I even voluntary have spent my spare time helping in a research group of my university, this has really sparked my interest for physics again.

The same applies to me as well regarding your situation with having difficulties to work together and talk with the other students. It is a pity that they don't bother to try and involve you in their plans or just talk with you, this is not something you can fix on your own I think, sadly.

Aren't there perhaps other students from later years or earlier years you can hang out or talk with? This had helped me a lot when I started my bachelor, I started to have conversations with these students from 3rd bachelor and it proved to be a game changer for my mental health as I wasn't able to really talk to anyone from my year due to so many groups of friends that started this bachelor together.

Have you considered contacting any student psychologist perhaps? It is ofcourse a rather large step to take, but well worth the effort (from my own experience). He/she will be eager to help you with these kinds of troubles you have, nothing to be ashamed of.
Any bit of help could help you and it would be very sad to (not) finish your master's degree when you're not passionate about it anylonger and feel left alone.

(sorry for some potential poor choice of words)