My "best friend" is slowly becoming more *****y and mean lately. We've argued a lot in the past few months but stopped recently. However, this past week, he's been incredibly rude and dismissive. One minute, we're fine when it's just the two of us, but now he seems to have found new people to hang out with and is asking, "Why are you here?" when I try to talk to him. He's nice when it's just the two of us, but when others are around, I get completely ignored. For the past few days, he's been really nasty but then says sorry whenever I message him. The thing is, he never really sticks to his apology. I thought he was my only true friend, but now I feel completely alone. This is really affecting my mental health, especially with exams coming up soon. I just feel like I really need a good friend in my life right now. Not sure what to do...