Friends are the family you have chosen for yourself, which means that you can also un-choose them. If you are having troubles with one of your friendships right now, be honest with yourself about the relationship. Are they making your life more enjoyable or more complicated?
Do they encourage you to be the best you can be or make you doubt your actions?
Do they celebrate your successes or try to one-up you all the time?
Answer these questions, and you'll know what to do.
somehow i find this scarily true lol