The ones who suffer the most pain usually have the greatest senses of humor.
Picking emotionally or otherwise unavailable partners.
Thats why they say you attract the right partner when youre ready.

God & Man
You cant be ready if youre too terrified to even start something that could last.
Forever is a foreign concept to you right now though.
Endings are the constant.
Seeking justification for seemingly insignificant things.
You will also likely apologize a lot for things that others feel dont need apologies.
Being very all-or-nothing on certain things.
Sometimes, fear of heartbreak can put a yes or no filter on things.
What is the point of this if it will not result in that?
(There is also an overused Marilyn Monroe quote that comes to mind.)
Love requires balance, which is why this attitude is usually done out of a fear of heartbreak.
Holding on to perfectionism.
This typically stems from the belief that love = perfection.
Seeking certainty in any way you could.
Reading the last page of a book, googling the ends of movies, embracing spoilers etc.
If you know how it ends before it begins, you might brace yourself for the impact.
Unfortunately, you cant do this in real life.
It can feel good to exercise control in whatever way possible though, even if its all fiction.
Playing off pain as a joke.
The ones who suffer the most pain usually have the greatest senses of humor.
Giving your all to that which you know is temporary.
With forever being a foreign concept, you still have a lot of love to give.
You will love it as much as you could until you cant anymore.
However, that will never be enough to stop you from trying.