Spoiler
I can't pretend I know what you're going through personally, but when I was younger I dated a guy who suffered from quite severe depression. He was a self-harmer as well, and a lot of the things you shared (which was very brave of you, I might add) sound so much like the things he went through... I have to tell you, he thought that everything was hopeless. He was ready to give it all up, and I was constantly terrified that one day he just wouldn't be there any more. Once he went on a long weekend away with his family and I forgot he was going, so when I didn't get a reply to my text (since his phone was off as he was abroad) I went absolutely frantic with worry until he got in touch.
Now, my point is this... After about 18 months of the above, my ex finally started getting therapy. He got loads better over a few months, but then had to move away with his family and didn't find another therapist. He found exactly the same problem as you - medication is important, but therapy also has a significant impact. We split up, not due to his health problems but because our long distance relationship wasn't working, but kept in touch enough for me to know that now (about 6 years on) he is doing so much better after having found another therapist. I sincerely hope that you don't have any more upsets which interrupt your therapy, as I'm sure you'll find that it is more and more effective the longer you go, and eventually (hopefully) you won't need it anymore.
In the meantime, remember - everyone is worth more alive, because then you always have the chance to make things better, even if sometimes it's difficult to see how.
Now, my point is this... After about 18 months of the above, my ex finally started getting therapy. He got loads better over a few months, but then had to move away with his family and didn't find another therapist. He found exactly the same problem as you - medication is important, but therapy also has a significant impact. We split up, not due to his health problems but because our long distance relationship wasn't working, but kept in touch enough for me to know that now (about 6 years on) he is doing so much better after having found another therapist. I sincerely hope that you don't have any more upsets which interrupt your therapy, as I'm sure you'll find that it is more and more effective the longer you go, and eventually (hopefully) you won't need it anymore.
In the meantime, remember - everyone is worth more alive, because then you always have the chance to make things better, even if sometimes it's difficult to see how.
