Am i okay?

I just need a professional answer, last week i went out with some of my friends, we rented a villa by the beach , so we spent our days swimming,getting high and having fun. One day we went out for a swim, two of our best swimmer was about to drown but luckily they didn’t at the end , the issue here while they were drowning and after that i didn’t feel anything towards that not even fear nor sadness just nothing a numb feeling is all i had. They started crying cuz they thought we weren’t gonna make it and they keep talking about it and then cry again i get that but yet i didn’t feel anything . Not even sorry for what happened not even empathy just nothing . I cant comfort them i feel bad about myself and how my brain works.