Congratulations on 5 days - good for you.
Since I've quit drinking my social life has changed drastically. I was worried about this a lot at first (and I think many people are) because most, if not all, of the socialising I did involved alcohol. I still go to pubs (very occasionally) if there is an event I must go to, such a birthday or something like that, but generally I have no interest in being in those sorts of environment any more. I guess I've realised that my physical and mental health is far more important than socialising... and I've also learned that I enjoy my own company now - I tend to have solitary hobbies such as baking. For now, try to focus on your sobriety and what you will GAIN from it rather than what you will lose... all the things we think we are losing through sobriety turn out to be things we could do without anyway, in my opinion.
Welcome to SR! Hope you find all that I have here. Wishing you all the best on your sober journey. x