You should not drink on SSRIs. They won't absorb into your system and anything in your blood will be excreted so the medicine will not work. Also, depending which one it is, it could cause really bad things to happen.
Not only that, but you are drinking a crap load of alcohol. Anything more than 2 drinks a day for males, 1 for females is a detriment to your health. That is one 12 oz beer, 5oz of wine or 1 shot, which is 1.5 oz of other alcohol.
2 liters, is 45 shots(22.5 each liter) at 1.5 oz each, a week. Divided by 7 days and that is approximately 6 1/2 drinks per day. That is a lot of alcohol, you need to reassess your drinking habits. Also, if you have to ask if it is a problem, you realize that it is not normal drinking behavior. You need to either stop, or drastically cut down.