Wow, I've never heard it expressed this way...but I really like it. I feel like it encapsulates the highs and the lows of a relationship.
I don't know that there's a moral or point to my story, other than to add my voice to the choir that, yes, it happens to me to. And maybe that sometimes there IS hope at the end of the tunnel.
First of all, of course there is! What you put in, get back. And the more you put in without expecting anything back, the greater the artiste you'll be.
This is the reason why I keep stressing that the best way to improve is to just make tracks. Especially for people just starting out. Just do it. Don't worry too much over techniques, you will get better with every track you make, guaranteed! The more tracks you make, the more you'll discover stuff about yourself. You develop your own personal workflow, which is the key to finishing more tracks quicker... And the cycle repeats, and then you get better and better.
Second, congrats on breaking through the barriers and finishing your track! It's a wonderful feeling, isn't it?

Plus, you discovered that starting the track with chord progressions maybe isn't the way to go for you, these types of things are so important in shaping your personal workflow. Keep at it!
Third, about the analogy thing, glad you like it

As a person who has been through 2 serious relationships and finally happily married now, I think I've earned the right to be talking about relationships like that! There will be extreme highs and extreme lows, of course. That happens even when you're not in a relationship. But if you love the person enough, obstacles won't matter and you work through those obstacles, you come back.
My husband (I'm a lady you see) is also a musician and we have it really good, thankfully. The secret to a long lasting relationship is this: you have to understand that at the end of the day, the two of you will always be two individuals.. You need your own separate friends, your own interests, your own space. Because when you die, you aren't buried in the same coffin (sorry for sounding really grim here!) Now how the two of you meet in the middle despite all of this...
that's a relationship. Wow, giving relationship advice in a production forum, that's a first!