Your aspirations and ideals are fine. They just need some focus. You can't be Iron Man, running off to solve this crisis or that. You will, at some point, need to make some decisions.
In the meantime, a degree would be helpful. It (almost) doesn't matter what it's in. Why?
Because over the course of your life, you'll make a good one million dollars (cue the Dr. Evil voice) more than someone who didn't finish college. That's not anywhere near enough to make you wealthy. It's more like an extra $20k/year for 50 years of work. It can often make the difference between crushing debt and none, or buying a house or not, or being able to travel and save money for retirement instead of living on ramen. Most college grads aren't super-wealthy, but it's a way to pull yourself out of what can rapidly turn into poverty if your folks pull the safety net out from under you.
You need not go into IT. Lots of people don't. But consider what you want to do, or at least what you think you might want to do. It might require an MA. Another reason to finish your BA. Plus you'll get a sense of accomplishment that might help with some of your depression.
As for helping people, how about joining the Peace Corps
for a year? You're at a great stage in life to do this.
But no matter what you do, I would suggest that you seek counseling. Talk to a professional about how you are feeling. Depression is not just feelings of being down; it may be interfering with your being able to focus on a particular career or academic goal, or with going for the relationship you want.
All the best to you.