Loving person perceives you and ourselves as a whole and jealous of those who encroach on your time and attention, because the resources that you take, take and it. It can offer to scare away from home most obsessive girlfriends and especially male friends. So you can ask a colleague male couple times a week to call you - and watch the reaction of his beloved. He could not immediately respond, but you will notice the voltage necessary.
See how he reacts to other women. God forbid you ask a man about whether he liked figure or another hairstyle of the fair sex. It is not necessary runs into such a thought, watch his body language. Loving man may look at other and admire, but never make steps towards building relationships. A step to the left, a step to the right. But if you stretch it matters, you will be perceived as overseer. So just watch the men's gestures and draw conclusions. Send for a purpose to his girlfriend to check out your favorite "strength" is also impossible, because it can not end the way you would like.