What do you do when you love

Well, we are pretty sure you would feel crushed. And want to introduce that person to your middle finger or its four little buddies that are often "on hand" to form a fist.

We know the feeling.

It is very painful.

Jenny Slate (Emma) and Charlie Day (Peter) attempt to portray this pain in the romantic comedy, “I Want You Back,”

Do they do a good job at portraying feelings that most of us have gone through?

Sure, they do. Especially because they come across as funny and, in Peter’s case, sweet.

Their shared pain as two unlikely friends who team up to mend their shared broken hearts is charming.

Slate’s Emma is really funny, especially when she comes across as the vulnerable mess she becomes after being dumped by her fitness trainer ex-boyfriend Noah (Scott Eastwood).

The two were together for 18 months, which is enough time for two pregnancies.

However, all Emma got out of that relationship is a four-letter word that doesn’t spell “baby” and rhymes with “quit”.

Charlie Day’s Peter is kicked to the cold kerb by English teacher Anne (Gina Rodriquez) after six years of being in love. Okay, that wasn’t exactly love but it was love adjacent, whatever that means.

Nursing broken hearts like they are two empty beer bottles, the tearful Emma and Peter meet on the stairwell in the office building where they both work.

Seeing one another in each other ("We’re Each Other’s Sadness Sisters") due to their shared jealousy and inability to get over the Exes, they decide to join forces to ruin the new relationships of their Exes so they can get back with them.

Their plan is simple: Emma will seduce Anne’s new boyfriend Logan (Manny Jacinto) so Anne can bust in on them introducing one another to each other's private parts and scream, “How could you? I am going back to Peter!”

At the same time, Peter will somehow lure Noah away from new girlfriend Ginny (Clark Backo) by becoming Noah’s best friend and then, like a good best friend, convince Noah that he should leave Ginny.

Supposedly, Noah will ask, “leave her for who?” and Peter will reply, “I Noah a chick” and then Peter will add, “she’s the chick you left…you know…Emma.”

It’s an interesting way to fill out 1 hour and 51 minutes, and the clever dialogue keeps "I Want You Back" going with lines like: "Can I Tell You a Little Secret About Being an Adult? We’re All Just Pretending That We Know What We’re Doing and We’re Hoping That We Don’t Screw It Up Too Badly."

Plus, this movie taught me the words endomorph (flabby) and mesomorph (muscular) and ectomorph (lean).

Also, the chemistry between Slate and Day defies the laws of physics as it keeps going strong even after the downer cameo by Saturday Night Live comedian Pete Davidson.

Ultimately, “I Want You Back” turns out to be a coming-of-age romantic comedy in which the two leads find in each other a future that no longer needs its past.