NO IT IS NOT A "MEDICAL PROBLEM!"
Sorry AS I swear this is not aimed at you or anyone specifically and apologies to anyone up front offended. But this is exactly the kind of thing I was trying to caution against - ie the growing, disturbing and frankly grossly irresponsible mindset in our society - and unbelievably, alleged psychological professionals - that if someone is depressed, it's a "medical condition" or a "chemical imbalance." Far more often than not THIS IS NOT TRUE despite how desperately our insta-fix society wants it to be. Why do they want that to be true? Because it makes things easy. Don't sit around hacking through the problem(s) itself and work things out; just pop a pill!
In fact if you think of it, it's absurd. Lost your job? You're not depressed because of that....it's a chemical imbalance. House burned down? You're not depressed because of that....it's a chemical imbalance. Romance break up? Spouse or family member just died? Legs bit off by a shark?? You're not really depressed because of that.....it's a chemical imbalance. Here munch on some prozac/zoloft/similar trendy anti-depressant happy pills. You'll be fine!
Based on the info given, it sounds very much like this depression is caused by a lost love. Again that is not to diminish the pain J is feeling to say the least. But this "well you're depressed, go get some happy pills" is way off the mark and every time I see or hear of a "doctor" or psycho-whatever throwing these things around like candy I want to vomit. These people belong in a walk-in clinic handing out band-aids, nothing more potentially damaging.
J again obviously none of us can say for sure, and I agree there is the possibility that at some point you do or should consider some kind of anti-depressants. But I hope you get a good therapist who is good at helping you TALK THROUGH and work out these problems...hopefully (eventually) through talks with them, and your "ex" will get your life back. If nothing else, "worst case" you will realize you need to move on and start over. 'Course none of those options are easy or quick. But unless you really do or have lapsed into chronic....ie long-term, cannot function, doesn't matter if the love thing is resolved or not....depression, I strongly suggest that if at all possible you avoid the happy pills and ONLY try them as a last resort.
/rant