Because he's unsensitive, unthinking and obvoiusly unable to display a normal level of consideration. You really shouldn't be with someone who's hurting you.
Yes, you should let her know; however, also reassure her that you will not act on that feeling. Thus, she will know how you feel and be able to avoid hurting or offending you.
tell her how responsible you are
tell her about it and then let her see it when her boyfriend is doing it
Well, if you know that she has a boyfriend that's great. But never let your parents know. Let your sister tell them. Talk with your sister and convince her to tell your parents.
Sweetie, if your boyfriend doesn't know how to be a boyfriend, then just let him figure it out or tell him what he needs to do! Step up and be a women!
if your 18 your parents cant tell you what you can or cant do anyways so nothing will happen to you anyways
you dont tell her, let her find it out for herself,
let him now you dont like what he is doinng
Trust your gut instinct. It will not let you down.
Tell them noob
The answer is simple. You find out if your friend is doing it for revenge on you, you tell them off in front of your ex- boyfriends face, who is now her boyfriend, or you tell her that she needs to give you your boyfriend back. And if that doesn't work, things happen for a reason. There are certain things that happen in life that you can change. In this instance - you certainly do not want your boyfriend back - you need to let go. You have made a bad choice of boyfriends. This world is full of potential boyfriends. Go on with your life.
(To let down a boy:) Tell him you already have a boyfriend...or describe other guys you think are hot.Example: We should hang out, you can meet Michael, my boyfriend. But first, let me tell you about Mitchell, he's so hot.