Feeling good is a trap- I set myself up so many times, started drinking without even thinking about past that.
I think there is a mindset when we have not been drunk for a while- it is easy to forget the pain, and so easy to go with the flow or get into party mood.
There are always places to go and people to drink with. There will always be the open invitations, and special occasions. We cannot take ourselves out of the equation.