Hi,
Don't stress ouit if you can help it. I've had similar experiences and what helps me is knowing that in 6 months time anything could have changed by then! you never know what is around the corner.
Don't beat yourself up about
decisions. There is never a wrong one to make. You make the right decision at the time and no matter what happens, don't regret it. Even if something bad happens it will be a learning experience that will help shape you as a person. I don't regret even a single decision I've made- even the bad ones.
I think seeing a Dr is good advice. The best advice actually. Find out what helps you mange your depression. Not FIX it at this stage, just MANAGE it. That's how I survived this long. If you persevere at it and ask for help you will get there.
As for relationships, you're only 25, you never know what or who is around the corner