No, you are normal you are just taking medication to get you through this stage you are at
Just make sure you address the underlying problem that causing the depression and you'll come out of this heaps better
And the AD's on there own wont help you, you really need to go find a good counsellor and start working on some of those cognitive behaviour skills
Seriously, if you want some hope here. Take the tablets, get some help and 4-6 weeks of counselling you will feal HEAPS better and by that time you will be well over your ex and focussed on how good you are feeling and then you will be a chic magnet