In the first place there is no such thing as a failed thru hike. It is only a thru hike that turned into a section hike. It's no thing.
In the second place I've been married and I've been single. They are just two different flavors. I was married for 18.5 years and a lot of good things happened. On the other hand a lot of good things happened while I've been single. Both flavors are good...just different.
Thirdly, life is like a thru hike. Just because there is rain some times doesn't mean it's not a good hike.
Finally I tell you about a friend of mine who came to me and said "My wife wants me to sell my Harley or else she's filing for a divorce." With out pause I said "keep your Harley...it makes less noise than your wife." While that may seem knee slapping hilarious to you the point is to figure out what's important to you and just do it.
(personal philosophy...no charge)