I was exactly how you described in high school. I had a group of 5-10 friends that we would hang out together but I was way more comfortable myself hanging out

I was exactly how you described in high school. I had a group of 5-10 friends that we would hang out together but I was way more comfortable myself hanging out just with 1/2 at a time. Then I immigrated to the US. I realized that with my current personality it would be hard to make friends. Im not usually outgoing/funny etc.. So I literally tried to copy how some of my more outgoing friends would act. It sounds weird to describe but I think it helped me. You don’t lose yourself completely but if you’re actively aware of how you would normally act, its not that difficult to think “what would X do” and just do that. And just keep doing iterations of that until this becomes normal. I think emulating friends helps cause we’re naturally not good at this, so this helps get in the reps. Then after a while its just you Most of problem for me were related to anxiety, being in a new country made it even more difficult.