The advice in this thread is low quality ball sucking bullsh*t.
If your girlfriend hugs another guy, there are 2 ways to react to the situation:
1 You think: 'this is a test, the best way to react is to pretend like I don't care'.
2 You honestly don't care because you believe in yourself
The first way leads you to a world of games, tests, paranoia and endless reading of pick-up material. A world where the focus is on women and you walk with a mask through life to hide your true, pathetic self. Jackin' off in your basement on sosuave theories to plan your next step in your relationship.
The second way leads to a world where everything flows automatically. A world where your're a natural and the focus is on you.
Which way do you prefer huh?