You mistook colleagues’ hesitation for doubt in your abilities. Actually they’re hanging back waiting for you to take the lead. Lead on!
There’s no reason why you can’t part on good terms. Problems stem from a mismatch not acrimony. You’re both moving on to better situations.
An adversary could be a valuable ally. Such is the nature of love and war. Size up what you have to gain and you might pardon that transgression.
You’re one of the few people to keep up with old friends. You’ll see the plus side when someone from the past pops up in a new and helpful guise.
You know the value of a secret. Keeping it shows you’re trustworthy. It also gives you an edge over those not in-the-know.
If you’re going to take on an enormous project then you’ll have to commit to it in full. Once engaged there will be no turning back.