Hi Fletch, I have BPD, Major Depression Recurrent, SAD and anxiety. The light box does help and the one that I have is even called the happy light, go figure. Making sure you have enough vitamin d is also important, this is something that we get from the sun and a lot of people are normally deficient in anyways. It is VERY normal for someone with BPD to have the feelings you do about inpatient, this is because it is a very validating environment and makes us feel cared for. Who wouldn't want that? You left the hospital in June, maybe start to get back on your feet and then the sun starts to go into hiding, I would be surprised if you were not fighting a funk. If at all possible take the meds as regular as you can, this will help to alleviate any possible up and down caused by medication, we have enough of them with out adding to, this also includes alcohol if you drink. I had to stop drinking completely, even one or two beers, because it would drop my mood the next day. Depression can definitely make you not want to do anything to include sex and like Longleaf said it could also be the meds. Hope this helped some.