What do you do when your friend is messing with your boyfriend?

Unfortunately that would not be much of a friend let alone a boyfriend. Your best bet would be to leave them both as if they are willing to deceive you now chances are they would do it again if you let them. Talk to your friend and your boyfriend and find out what really happened. If they admit to it, that makes things easier, but if they deny it, you need to decide who is telling the truth. Trust your gut. If your boyfriend cheated on you, you need to get rid of him as soon as possible. There are very few situations in which it would be better to work on a relationship after something like this has happened. (Like, for example, you have been married for years and have kids together, and he is really sorry and ready to change.) In most cases, the sooner you get rid of him, the better for everyone involved. Most people would agree that honesty, trustworthiness, and caring are three qualities to look for in a boyfriend, and he has just thrown all of these out the window. Again, talk to your friend and make sure that what you think happened is what really happened before taking action. If your friend admits to it and is not sorry, that makes your decision easier, get rid of her too. But if she is sorry and you have been friends for a long time, that makes your decision harder. Only you can decide if she really cares about you and if you can ever trust her again. No matter what, tell her how you feel and how her actions have affected you. Although it hurts to lose people that you cared about, there is really no reason to keep them around if they are not true friends. Please remember through all of this drama that none of this means that you do not deserve to be loved. The actions of these people have nothing to do with your worth as a person. Remember that life is full of ups and downs, and relationsips have ins and outs. People may come and go from your life, but through it all, you are the person who really matters. Do not bend over backwards for anyone, but rather, take care of yourself, and do what you need to do. Resist the temptation to stay with these people just so that you won´t feel alone. If these people are not treating you with love and respect, you are better off alone, at least until you find friends who really care about you, who are worthy of your trust. If these people are not caring for you, you need to care for you. Remember, the foundation of all respect is self-respect. Respect yourself enough to remove yourself from bad company.