How serious are you about salvaging this relationship? Are you 100% committed to an attempt?
If so I need more data in order to assist you. The more time passes here, the probability of success diminishes.
1 - your ages please
2 - exact timeline of events, summarized
3 - event that occurred 8 months previous
4 - exactly what you have done so far in an effort to rebuild your bond
I won't pretend you have great chances at this point, but I do have some insights to share, so reply to the above if you are willing to go there.