With reactive depression CBT is going to be your best treatment. Do not turn to medication, when you are depressed because of life events that is best treated with therapy - not meds. Meds can cause you a whole lot more problems than solutions in this kind of depression. Most GPs will give you meds straight up now. Really bad idea. Find a therapist and work from there, it will give you the most benefit in the long run. Remember you are not alone, many people suffer from depression and there is a lot of support here.