I would tell the person you know how you feel about the person they are dating.
Yes =)
Once you start dating, and the guy seems really interested and nice and funny to you, then you'll know ;)
you just have to trust him
NO!!!!!!!!!! lol calm down we know he ain't
dating is when a ... girl & a guy go out to get to know each other, (the idea is the they like each other before they go out) the point about dating is you get to know the person you like better.
Meaning, if he is going to get with a girl, or if he already is with her. Then he'll tell u b 4 anyone else/
by the way he acts or the way he talks to women.
When the guy or girl your dating like to say "Did you know.." its really annoying.
Probably an Internet dating site. You could check Facebook, but it will be weird if you don't know the guy.
Maybe he is dating them to get you jealous. Some guys will date people you know to make you mad or to get your attention.
If the girl is dating another guy yet showing interest in you, this implies that the girl is not trust worthy. there is no need to probe any further, don't go for a girl who changes dating partners.