If he tries to change the subject when you talk about dat guy you like, or gets mad or If he compares himself to the guy you like and acts weird when the guy you like is around you.
You can tell him that you like him or find another guy or you could try to make him jealous.
Definitely! If he asks you who you like he has probably caught you staring at or flirting with another guy and is jealous! Just ask him why and he will probably tell you that.
i have experienced this, girls are quite evil, they sometimes do this to find out if you like them too.
get her jealous or tell her how you feel
That depends on the guy. Some are jealous, some are not.
YES!
It could be possible that the guys are jealous since the girls like your legs.
try and cause trouble with the guy your dating
She likes you and hopes your jealous, or she feels close enough to you to tell you that.
If the guy's your boyfriend then that is more or less normal. If it's not then it means the guy likes you. If you like the guy too then you could get together but if not then tell him to take a chill pill and cool off.
He either is trying to make you jealous or he doesn't want you to be jealous
Well, you can't tell that much, but if you mean seeing another girl, I don't know. If you mean talking to another girl, you are just really jealous. he just starts talking to another girl, and looking at you when he is talking to make you jealous. flirts with her, stuff like tht you will probaly see it, u don't have to ask