I really don't know or maybe dey get more girlfriends that way.

Look at his actions and movements u are bound 2 no.

Chat with other guys and go out wid dem I tink that should work.

Yes it does,but they don't show it.

Maybe they like your qualities,and it makes dem  feel 2 b like u,but take dis from me girls always jealous and envy other girls.

Maybe she loves you,and seeing you with others makes her jealous?but you can ask her what is her problem

I would say love mostly,for hate you feel angry.

I would say to the person him/or herself,because that person needs a lot of encouragement.