It's the day of love. It's supposed to be a time for chocolate, flowers, and love notes in cards.
What happens though if the relationship ends?
Celebrities' every move is followed on social media, making it nearly impossible for them to keep their breakups a secret.
When they reveal information about their ex themselves, it becomes even more difficult.
Look at Megan Fox. She posted a mysterious message on Instagram before deleting her account, sparking rumors that she and rapper Machine Gun Kelly had broken up.
And not all celebrities are that subtly. In response to the highly public Instagram feud between Selena Gomez and Justin Bieber, Rihanna attacked all of her ex-boyfriends in one post.
Do the same guidelines still apply if you don't belong to the Hollywood A-list or have 10 million followers, though?
Etiquette expert William Hanson, who has provided Newsbeat with his social media dos and don'ts after a split, is one person who is aware of this.
William, who is close friends with Radio 1 presenter Jordan North, says, "If seeing pictures of your ex pop up constantly is going to trigger you then yes, maybe do a mute.".
To be quite frank, I believe blocking is a little bit harsh and likely communicates to the other person your true level of personal hurt.
Additionally, the majority of people who have experienced a breakup don't want the others to know that they are even thinking about their ex.
"A block may therefore emit the incorrect signal. You are safeguarded because they won't notice if you use a mute. ".
"In my opinion, you sometimes act too quickly. William tells Newsbeat, "And I would just pause for a second to consider what you do.
"I'm so close to wanting to delete all of my social media.
Just so you're not tempted to post a motivational quote or a thirst post to express how miserable you are feeling or to attract the attention of your ex or other people.
"I'd be tempted to abstain for a few days, just to give myself time to really reflect and consider what the best course of action should be. ".
If we haven't all done it, we've probably thought about it: a post or story calling out a partner in a heated argument.
It's never a good idea to publicly discuss your breakup or to criticize them, William advises.
"The moment you do that, you regain the upper hand.
Even if they mistreated you, two wrongs do not equal a right. ".
What if you believe your partner has been cheating on you?
If a third party was involved, William says, "I wouldn't feel the need to send them a message unless, let's say, they were a very close friend.".
"Getting involved and letting loose on them if they were a stranger isn't likely to resolve the issue.
Open a draft note on your phone and type that message you want to send so badly, by all means. Don't send it anyway.
"Noting it down on your phone may be helpful, but actually sending it to them rarely works, and you might come off as a little odd if you do. ".
Posting something that is trying to attract attention is not a good idea, in William's opinion.
The very nature of social media, he claims, is that we constantly seek attention from others.
"I wouldn't advise performing a thirst trap ever, but I can appreciate people's desire to feel a little bit validated by online users. ".
William, has one ever been posted?
"No, nobody needs to see that. ".
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