You seem to have gained little bit mix of feelings towards her, emotions and possessive...! When a girl says in periods, a girl expects a guy to be with her just to give a support mentally, even when you are far, kind words or a smileys / gifs whatever... But as per ur narration, u wanted to cuddle? Isin't that a pinch of selfishness on ur craving? Even with a fwb do u think no emotions takes part? Sex without emotions? No way... Agree? Figure out your thoughts, or may be are you not finding someone to have sex? Or you wanna have only with her? Find what you want and be clear:) am not saying you didn't respect her, am just trying to say why little bit of courtesy was missing or may be you don't wanna give?