How long does it take to get back in the "work out zone" ?

I use to work out everyday it was a priority for me .. Wake up go to work .. Go home eat .. Then hit the gym.. I fel great my body was looking great ppl were telling me how great i looked n how much weight i lost. I wasnt obsessd or any jus worked out 60 min a day. I did that for like 3 months n then started drinking alot n blah blah so i havent worked out in a year. Ill do it for about a week then stop. I just really dread doing it!! Befor i loved it sometimes i couldnt wait to go to the gym. .. How long does it usally take ppl to get past this hard part? 2 weeks? 3 weeks?? Thx