I often find myself doing the same thing. I think I do this because it takes my mind off the crushing weight of my depression for a moment. While I'm helping others I generally feel a little better. The problems occur when I start to neglect my own needs or people deplete me. I just suffered a bit of a breakdown because I wasn't focused on caring for my own needs for a while. Getting back to doing that now.

It is hard to take time out for yourself, but it is necessary in order to survive the day-to-day struggle with depression. Here's hoping you stop feeling as though you're unworthy of that self care because you most certainly are.