feels like I've lost myself in first year

idrk if this post is relevant to this sub but I feel like I've changed sm since coming to manipal and I don't like who I'm becoming..it's not exactly like I'm changing myself so others can like me but it's more of like experimenting w stuff others do/like to see what it's all about (not drinking or smoking but on a deeper level.. hookup culture etc) and it's so opposite to the principles and morals i had less than a year ago...i can't help but feel so sad about not being who I was and all the cool things I stood for ik change is inevitable after coming to college but at the same time I kinda don't like who I am becoming..feels like idek who I am anymore.

I feel so so lonely. i wish I had a better way to cope with stuff or just go back to the person I was and stop changing for the worse :(

any advice would help 😭