Relationship advice - the Ex factor

I broke up with my boy last September. At the time I didn't know why - I just suddenly felt this intense hatred for him, which was quite scary to be honest. I just couldn't be with him. I didn't want to break up with him, but he took it that way. I just wanted a break.

Anyhow - we broke up, and I flipped back again into loving him. At the time, I had no idea what was going on with my own emotions, so I couldn't explain to him. All I knew was that I wanted him back and that I was going to end up alone.
I stalked him for a while, though. I would text him every night (with or without replies) and I just wanted that relationship back.

Recently, I was diagnosed with Borderline persoanlity disorder - which explains, and is characterised by, insecurity within relationships - a fear of being alone, but a hatred for the person you are with ("I hate you - please don't leave me")

I'm wondering if I should email him and explain this to him - not what I've got as such, no details, just that I've been diagnosed with something which is almost definatly the reason I broke up with him.

I'm not looking for forgiveness, I'm not looking to get back with him - I just feel that I owe him an explanation for why I broke up with him, as I couldn't exaplin myself then.

Any thoughts? x

Now, I think