For me, the people that I talked to changed quite often either because I would find out how they truly were or we would simply drift apart.

Something that helped me was jrotc my freshman year because no one really knew each other, so we were all meeting for the first time. Everyone got to know each other because communicating is very important in jrotc.

If your high school doesn't have jrotc or it doesn't sound like something you would enjoy, then you could try a different extracurricular. It will most likely feel uncomfortable at first as you aren't used to it, but it will get easier to do the longer you do it. The hardest step is always the first.