A brilliant test that always works and tells a million stories but you might have fucked it for this to work!

When say your chilling out and your both sat watchin tv or summat go to use your phone fiddle with it, then say "fuckin thing" as you do this reach toward her phone and say "just gonna send a text on your phone babe"

If she doesnt blink an eye lid - safe

If she moves slowly to stop you - may just be pissed off that you have assumed you can use it

If she dives for the phone/checks it and gives it to u - put her stuff in a bag and tell her to fook off......... Either shes slaggin you of to her mates, has got blokes textin her and vice versa... either way its not worth it

Phone is constantly empty ie no msgs in outbox or inbox - signals long ongoing text convos with potential new partner