I think you should deffinately talk to her about it and tell her how you feel about the situation.
Act like you do not care and see how they react. If they are upset you know that they really care if they aren't move on to other friends and pay no attention to them.
Break up with him if he cares about you that much it would be only you. There will be other guys in your life don't sweat it.
You should talk to your girlfriend about it. Talk to her about how it makes you feel when you see her flirting with other guys.
In other words, he probably thinks you're a stalker. Or he wants to have two girlfriends and be a playa. You don't need to have a crush on him. Have a crush on someone with honesty. True, to the above, but it can also mean different things. He may not actually be a "playa", but actually might just want to be nice to you. Hiding his girlfriend from you kind of shows about how much he cares about what you think of him and that he actually cares about your thoughts and feelings. And because of that, he probably doesn't want you to get hurt if you see him with his girlfriend.
Move on. She doesn't (obviously) want you but she doesn't want you to want anyone else other than her. It's a nasty game that girls play.
Well if you are getting bored with your girlfriend then maybe you and her should make a list of things about each other that makes the other bored.
umm let me think..... DEFINITELY!!!!!!!!! you should probably ask her if she is in love with you or this other guy!!
find another girlfriend
talk to him an tell him that you love him and tells him how much you care for him an he will respond
You should just ignore them and date someone else better then her or him.
He should deffenetly be mad and jelious
Show affection to each other and show you care.