<human>: Can you provide a brief overview of the text?

This is mostly for me, but words of encouragement are always welcome. I need help following through. 

I (F/27) have been with my 30 year old boyfriend for 9 years. We have lived together for the past 3 years while we both finished our college educations. Yesterday I graduated with my B.S. and he graduated with his PHD. Today I decided to move back home with my parents while I search for a job teaching art. 

My deciding factors include: 

He is extremely depressed and angry because he can not find a job (3 interviews/68 applications). I first blamed his depression on the stress of writing a book and a dissertation during the three years we lived together. When he finished one accomplishment I told myself now he can relax and be happy, but he never was. I am afraid that I will keep telling myself "as soon as he gets ____ he will be happy and then we will be happy." 

A few months ago he confessed to me that his life has been one embarrassment after another. He also told me that it had crossed his mind that after graduation we no longer have a commitment to be together.  This broke my heart because I thought after graduation we could get jobs, and he would finally give me the ring I've been waiting for. I realized this will never happen so today I decided I didn't want to continue going on like and started packing my bags.  

Should I help him through the depression with hopes that things will get better or should I follow through with the threat of leaving for good?

During the first month of student teaching I made many empty threats because I didn't have the confidence to manage my own classroom. My co-op said "I bet you do that in your personal life as well,"   she hit the nail on the head. I have seriously threatened to leave my SO at least 20 times expecting him to make some kind of earth shattering change. I feel pathetic, and I don't want to talk to my friends about my decision because I know they have heard the girl who cried wolf far too many times.
<bot>: Should I help him through the depression with hopes that things will get better or should I follow through with the threat of leaving for good?