Do I have ADHD/depression?

First of all stop smoking marijuana. You do seem to have some symptoms of depression, I suggest you see a mental health doctor or counselor. I don't know how you are able to have a girlfriend while being depressed. i hated being around people when I was depressed. You need to go see a counselor because you seem to have a lot of issues going on. And please put down the smoke it will only add to the memory loss and confusion.