Sweetheart sorry to tell you but yes the are attracted to each other. Saying that each other are ugly if the are clearly not then that's the back door out to avoid talking to you about it. I would watch this one. You never know who might start seeking comfort and that friendly advice could turn into something they will both regret. Keep an eye out. You might have a backstabber and cheater on your hands. Good luck though.
Well, first of all. You need to tell your boyfriend to STOP! If you think that they are flirting than they obviously are. Girls can usually tell when someone is flirting with another person. He more than likely won't tell you if he thinks she is pretty or if he likes her anyway because he's afraid of hurting you. Some friends are back stabbers and would stab you in the back as soon as you turn around so just watch what's going on real close. You might find your answer just through that!
Once I heard my husband flirting with a girl. I checked number and found it was his friends wife. I started same with his friend. So I knew the pleasure in flirting. So we are cool now. But we both don't talk each other