I am soon going to be leaving college and over the past 2 years (duration of college) I had been severely depressed, it peaked the beginning of last year. 

I have one teacher who actually cared when I told him about it at that time when no one else in my life ever has. I was pretty bad at the time, SH and I had planned to end my life and was going to go through with it. He eventually came to find out about the SH and knew I could have suicidal thoughts but never that I was actually about to do it. 

He actually cared and checked up on me and makes time for me, as annoying as I can be as I would rather hang out with him than any of the other students, who I had become distant with for their lack of care for me during this time, when I always make time for them. This was the reason that I decided to keep pushing and not go through with it. As hard as the past 2 years have been he has been there for me during all of it. The school failed me, the healthcare system failed me, he was the only person to actually listen to me and give me good advice. We are very close and I am very honest with him so telling him this wouldn’t exactly be out of the blue. He knows how much I appreciate him but I want to tell him this because I think he deserves to know. 

How would I go about this? I was planning on telling him after my exams when I come back to say goodbye to him. Thanks!