My crush/guy friend asked me advice about his ex...? But...?

this guy likes you, believe me. he's trying to make you jealous. DON'T act selfishly!! always be kind, friendly, and a good listener around guys, otherwise the cirstances can backfire on you a lot!!! he's trying to test you, believe me I've been in pretty nearly the same situation. mold your actins to fit this: act as if you couldn't care less about the other girl. you'll get a more positive response from him. And as for WHY guys do that, it's in their genes. they are pros at making girls jealous. don't let him get to you, and don't stoop to his level by talking to him about other guys!! they are always trying to see what kind of reaction you'll have. good luck, i hope this helps you♥