If so, this article is really going to help you out. It features 11 reliable ways to tell that your FWB is beginning to catch more romantic feelings for you.
But, before I introduce those, let me tell you about an online tool that will make this task so much easier.
You’ll learn about who they’re communicating with, how often and what apps they’re using to do so. This includes Tinder, Bumble and other dating apps.
With that said, let’s now take a look at some behaviors for you to watch out for within your FWB.
1. They Call Or Text More Often
Let’s get real here, under normal FWB relationships, this person will probably call you more than a “friend.” It’s only natural that calls or text be centered on arranging “hangouts,” after all, the “relationship” is strictly based on satisfying each other’s sexual needs . However, once you notice that the frequency of calling or texting has significantly increased, there’s a need to be suspicious of his feelings.
Furthermore, if the calls are more 
about topics you guys never talk about (e.g. how your day was, what you had for dinner and generally checking-in to see how you are doing), there’s a huge chance he’s into you and you might need to let him know you don’t have the same feelings.
2. Passion-Filled Gaze
Another way to know when someone has feelings in an FWB relationship is the passion displayed in their eyes . A quick look at him and you can easily know if someone is happy or gloomy even if they aren’t saying anything to you. That’s because the thing that gives off a lot of details are the eyes; even when the mouth is saying something completely different.
Equally, you can see the passion in someone’s eyes if you are attentive and want to know how to tell when an FWB is having feelings for you. Before you confuse this passion-filled gaze with the usual eye-contact that occurs during sex, think again. This isn’t about lustful, sexual desire, it’s one of those puppy-dog looks silently screaming “ I’ll go anywhere with you if only you’d let me .” If you notice this frequently outside the bedroom then there might be more than just sex on his mind.
If you pay attention to details, use your peripheral vision, and you know how to read body language that people adopt to mask their action , this will be easy for you to pick any time you meet-up.
3. He’ll Want To Spend More Time With You
If you’re in an FWB relationship with someone who likes to have sex a lot and you are equally on the same boat, there’s probably nothing to worry about if he wants to spend more time with you for more sex. However, if you notice a significant increase in his willingness to hang out and it’s not just about sex, there might be a need to worry.
If you aim at knowing how to tell when a FWB is catching feelings, this is probably one of the easiest ways. If he’s suddenly planning his life around you, inviting you to the movies or picnic and isn’t always interested in having sex afterward. Then, it’s likely he’s been shot by some of Cupid’s arrows. People don’t put in work into a venture that means nothing to them asides sex they are already getting freely.
4. Jealousy
Jealousy should not be a part of FWB relationships. However, this is another very simple way to tell an FWB is catching feelings for you. This is because jealousy may be very hard to conceal . However, it might not be very easy to spot if you are not into him. Look at this way, it’s only natural you would pay very good attention to someone you are crazy or care about. Hence, you would be sensitive towards them to see when they are hurt because of your actions.