Not every FWB couple will operate by the same set of rules. But if you want your situationship to have any chance of success without anyone getting hurt, you’ll both need to get on the same page about some very important details.

1. Establish clear boundaries

Work together to establish boundaries you can both agree on. Maybe sleepovers are a no-go, or public dates are off the table. Knowing the dos and don'ts will help prevent things from getting messy.

2. Discuss exclusivity

Some FWBs agree not to sleep with other people, while others are free to be intimate with whomever they want. Come to an agreement together, and then stick to it. They may not be your long-term significant other, but they still deserve your respect.

3. Leave your expectations at the door

The only fantasies that have any business in a FWB situationship are the sexual kind. Don’t get sexually involved with someone you fantasize about winding up with in the end — you might just get your heart broken.

4. Be safe

Always, always prioritize safe sex. Use condoms and get tested regularly for sexually transmitted infections (STIs).

5. Don’t act like you’re dating

This isn’t a hard-and-fast rule, but if you’re dead-set on maintaining the “casual” in your casual relationship, avoid situations that mimic traditional dating, like sleepovers, postcoital cuddles, and romantic dates. 

6. Be prepared for jealousy

Feelings can sneak up on you. If you start getting jealous or sense jealousy from your friend, it might be time to step back or have a heart-to-heart chat.

7. Avoid the “L” word

Steer clear of saying, "I love you." You’d be surprised how quickly those three little words will make things go from casual to complicated.

8. Expect the end

Most FWB relationships are short-lived, either fizzling out or ending abruptly when one person becomes more serious with someone else. Remember, they’re not Mr./Mrs./Mx. Right — they’re Mr./Mrs./Mx. Right Now.