I used to drink and when I did I had lots of "friends"... I realized quickly that they were more bar buddies then friends once I quit drinking. .. When no one came around to check on me when I stopped showing up everyday. .. When I quit my job. .. When I left town. .. no one came. . No one cared.
You will learn quickly that the people who matter will still be there. You will make new friendships that do not revolve around the bar. They will be real and meaningful. Just give it some time.