I talked to this guy once at the end of last year and he seemed to be really nice and not saying much (I came up to him) but since then, he acted differently especially this term at school (I'm 14). I noticed that he always was hanging by his self but then this term he (out of no where) started to hang out with the guys who play sport every recess and lunch but then these guys he hangs out with hangs out near where I hang out. He also looks at me a lot like I was once lining up in front of my classroom (he's in a different class) and then I randomly look at the direction of his classroom and he was looking at me and when I noticed he was still looking at me (so we were looking at each other) but it was only for like 5 seconds. Another time was when I was hanging out with my friends and I randomly look at the direction of where the boys (the guy who this question is about and others who plays sport) and I saw him staring at me but when I noticed he quickly went back behind wall. I also notice that at recess and lunch he's usually hanging out where I am even when he used to hang by his self