As if maintaining a relationship isn't challenging enough, modern-day couples have to contend with yet another potential stumbling block in their love life -- Facebook jealousy. A recent study found that the more time people spent on Facebook, the more jealous they were. That's not all: The social networking site is also increasingly being used as a source of evidence in divorce cases, according to lawyers.

To be fair, Facebook itself isn't inherently bad for your marriage, but one thing is for sure: If there are pre-existing issues in your relationship, chances are that Facebook will expose and exacerbate the cracks.

So what are some of the red flags to watch out for?

Here's the lowdown on the kind of Facebook scenarios that can cause relationship strife, and how to address them:

1. Excessive sharing

If things are going well, it's tempting to plaster your happiness all over Facebook. But bear in mind that while you may be keen to share details of your relationship with the world, if your partner isn't this can cause friction. It's a good idea to first sit down with your partner and discuss about how much you're both comfortable with sharing about the relationship.

2. Photos with your ex

If you still have photos from past relationships lurking on your profile, don't be surprised if your partner doesn't like the idea. It might seem innocent to you, but you risk your ex thinking that you've not quite moved on from your ex. If you uploaded it, delete it from your profile. If you're just tagged in it, it's time to hit the untag button.

3. Seeing something suspicious on your partner's profile

If you've seen a photo, comment, status update etc. on your partner's page that makes you uncomfortable, don't keep it to yourself. This only breeds paranoia. You may have got completely the wrong idea but you'll remain in the dark unless you bring it up.

4. Accepting friend requests from an ex

Should you accept a friend request from an ex? Hold off until you have checked that your partner is okay with the connection. If there is any possibility that your partner will be unhappy to know that you are back in touch with an ex, it's always better to ignore the request. Many relationships have been destroyed after one partner reconnected with a former flame so if you do accept the invitation, remember why you became exes in the first place.

5. Slagging off your relationship online

When you have a fight with your partner, never ever post about it on Facebook. Aside from being hurtful, these heat-of-the-moment updates can provide endless drama for your friends. Don't let your relationship be the entertainment!