scared of regretting my choice

I recently got accepted into ucla, uc berk, usc & ucsd for this application cycle. (neuroscience) im technically committed to ucla. it was my dream school for a while. I've ruled out usc & berk for other factors (area, cost..) but im scared im making the wrong choice b/w ucla & ucsd

I attended ucsd admit day w my friend (we're both from San Diego), and I really liked the Campus and La Jolla. I also received a merit scholarship to ucsd, which helps considering I received nothing from FAFSA. (the Haag scholarship)

I really like the ucla campus too (but nothing beats La Jolla imo), and im excited about the prospect of experiencing freedom while not being too far away from my family and friends. I feel like a component of this fear is me feeling scared to leave my close friends (all of my best friends are attending either SDSU or ucsd) + stepping out of my comfort zone. my very best friend is attending sdsu-- if I went to ucsd, we'd get to continue hanging out all the time. I don't have any close friends going to ucla.. I'd have to start over. there are other factors feeding into this fear, too, like my mom's stress over me leaving San Diego & ucla's cost (though my mom's assured me she can cover the whole thing).

I dont know what to think.