single mom considering adoption for my two year old

I was there! I was a single mom at 20, working, going to school and trying to raise my son. I also suffer from depression. I did not always make the right choices and was oftentimes not very patient with him. (He was also a very difficult child - ADD) I look back and feel a lot of guilt about some of the choices I made and the selfishness I often displayed. BUT, I loved him and he is now a well adjusted 23 yr old man who is engaged to a lovely girl and has a great job. He calls me several times a week just to talk and we have a great relationship. It sounds to me like you do love your son, you just have too much on your plate. You might also see about getting some help for depression. I so wish I had done that sooner in life. There is no shame in being on medication for depression if that is what is needed! I hope it helps to know that you are not the only one to go through this. You can make it!