Am i stupid for being jealous of her?

[PandaNanda]

First thing, it is not you, its not your fault and you are not less than the other girl
Second count yourself lucky - with his behaviour would he really have made you happy or would he have just destroyed you - I think that he is someone that will make other people around him feel insignificance and not worthy.
Thirdly not all men behave in the way he did - there is someone out there that will love you for who you are and you do not have to act in any way to keep him
Lastly - do not have relationships via facebook they are so shallow and those people that are jealous will try and destroy you.
P.S: Do go on facebook and un friend him - you do not need him
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