Hi...!! The entire forum can be used as a means to study with buddies. Thanks to the founders of this wonderful forum.
You can always join CHAT room, post your questions and people present at the moment will start discussing the things and you also can do the same - share your thoughts and opinions for the questions being posted there.
Also, you can answer the timer questions, post your opinion for every option and also can post new questions there.
There is no dearth of possibilities and people sharing their opinions new posts on verbal (CR, SC and RC) and quant (DS and PS) forums.
Of course, I just have shared my experience about how I am amazed with this forum and how many ways once can leverage this. However, if you are looking for some study buddy who can study face to face or be online the same time, you are oing to be then that's a different matter. Still you will find the some people who are online in the same timings you are and you will be able to make some good friends.
Just put my thoughts, ex-cues me if you disagree/if I have gone beyond.
All the best.