How can you instantly differentiate a guy who is attracted to you to a guy who isn't?

Puppystarfish23

I find it really hard to tell with guy if they are my friend or they are after something else even though I have a boyfriend it still worries me because I'm not sure if I should trust them or not.

For example a male work friend offered me a lift home from work the other day and all the other women starting telling me not to get into a car with him because the last girl he gave a lift home said he tried to kiss her but this guy is a bit of a dick head he has a girlfriend and this other girl who says he tried to kiss her is known for being over dramatic about stuff.

I get this vibe from certain men sometimes but I'm told by others I'm overthinking it.

How can you instantly differentiate a guy who is attracted to you to a guy who isn't?
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