Do you think going to look for someone you lost is a good idea?

I had a friend of 2 years. One day he disappeared and no one heard from him again. His parents don’t care about him and I was basically his only friend. He’s been gone for three months. He always talked about living in new york. the cops in my town won’t do crap and say ‘he will be back, i’m sure of it.’ I have been so upset and nearly dead because he is missing. I’m thinking about going to new york to find him. my friend is 19 and i’m 18. any advice? i really love him and want to find him. i want to be with my friend, but i need advice. he has pulled stuff like this before, but only for about a week