Hello! I feel your pain, and I have a suggestion for you.
First of all, I was on Lexapro last year for about 8 months. I gained 20 lbs. and felt disgusting. Had to buy all new clothes. I am only 5'4 so 20 lbs. is a noticeable weight gain. I went off of it October 2008 and still did not lose weight even being off of it for months.
I just went on Wellbutrin 4 days ago and it IMMEDIATELY took my appetite and any food cravings away. I already feel lighter! Plus it gives me tons of energy to go to the gym, because it is a stimulant as well as an anti-depressant.
I would SERIOUSLY recommend Wellbutrin for weight loss.