I know it's really REALLY difficult, but try to relax and not try so hard. I understand how angry OW can make you feel (I was quite vindictive towards OW and did whatever I could to hurt her.... it felt good, but didn't make me look like the greatest person)....
Anyhow, read, reread and REREAD Db stuff every day. Focus on having a positive mental attitude (PMA) regardless of what H does. Try to be the type of woman ANY man would want to be with. And just try to be H's friend. Be a good listener, add humor when things are nutty and just take it a day at a time.
There is no arriving, ever. It is all a continual becoming.