Backed-up Q&A site question about fixing relations with JRLM

What are some good ways to repair a broken friendship from 7 years ago?

An old high school friend "got uncomfortable" at my "worrying too much" so betrayed me in 3 phases: One in April 2007, the 2nd in June 2007, and the 3rd and last way in August 2007, after a mutual friend named (Yneel) <i>(encoded)</i> messaged me that "she just need(ed) some space right (then.)"

I know we've all matured since then; enough time has passed and states now separate me from (Wrffv ZpFcnqqra {arr Yvaqre}, ure abj-uhfonaq Fpbgg, naq ure yvggyr fvfgre Wnzvr.) <i>(Encoded for privacy reasons.)</i> That's why I hope our progressed maturity will enable them to forgive me for my prior insecurities and worries.

So what are the best ways to get our personal standings with one another restored to the normalcy that it was pre-2007?