The only way you will know is by asking her. If the two of you really know each others, by asking her directly and if she lie to you, you will sense it. Believe to your own faith and instinct. Remember the old saying, " the truth will set you free."
On a holiday, you would want to spend time with your girlfriend. And if she is cheating, she'll refuse to show up. That is one way to find out. Also, her weird reasons for not doing what you usually do, can imply that she is cheating.
Follow her
tell her.
then he must be cheating on you if he has a girlfriend? i mean if he likes you and has a gf then he must be cheating and wanting you?
Only if they don't know about it. I would ultimately depend on the terms and conditions of the "relationships" that you are in. If you are their girlfriend, then most would probably consider this cheating.
We can not know that and thus can not provide you with an answer.
Ask her if shes cheating on you! Nah im kidding i dont know sorry ? :( and im a guy
She keeps her phone and diary away from you.
cheating is doing anything you wouldnt want your wife/husband or girlfriend/boyfriend to know about
Anything your girlfriend (assuming you are a guy) would not want you doing with the opposite sex. Basically, if you are doing something with someone that you would not do in front of your girlfriend, then you are cheating. Cheating has to do with violating your girlfriend's trust. Some girlfriends may not care if you give another girl a massage, while some may. If your girlfriend is in the latter category, then you are cheating if you do it.
Sweetheart, if you who know who she is and possibly lives with her don't know, we certainly do not.
if your girlfriend is out and you don't know were she is you should probibly look for evidence that shes not cheating on you