Maybe jealous isn't the right word.but if your girlfriend is ok sharing you with another girl, you can guarantee she'll expect you to have the same "ok" attitude if she's talking to another guy "friend".
SO TRUE!-Some people are so blind. One sided relationships are way too common. And what sucks is that person won't realize it until they have lost a friend. If they even care, which they don't, or they wouldn't have let this happen in the first place.