I hope one day whenever she’s ready to date again that she’ll maybe be into me, but I’m not going to put myself on hold for her.
Hold yourself to that; try not to compare her to people you date (you aren't dating this woman, so it's irrelevant).
Any hope with this one might be the worst thing for you and your future relationships. It will cloud your judgement. Even though you want to be "friends" there is a big imbalance here, and there's leverage she has you won't be able to shake off.
Staying friends, the best case scenario is what? You invite each other to your weddings? Most likely you two will stay in contact for a bit then drift away. Your future relationships may or may not like you staying in contact with someone you are hung up on.
Worst case scenario, you start dating other people, she gets jealous (not because she wants you romantically, but doesnt want to lose your attention) and sabotages your prospects.
Don't mean to sound negative, but the *ODDS* are low for this ending well. A wonderful friendship could flourish, but how would you react if she starts texting you about relationship problems since you two are such good friends?