As stated in my comments under mrscti. I personally feel that your friends should ever decide whether or not you date someone. In my mind I would be thinking. Okay, I thought I was dating you, not your friends... But the problem that lies is that women don't think like this. They will stick by their friends side, and will break up with a guy off of baseless accusations. You hear the term bros vs hoes. Now this can be true, where guys will leave their girl because their guys don't like her. Not trying to agree with any reason, but for the most part, the reasons are severe, like she has another guy, or saw her all up with another guy the other day. Now sometimes girls have a good reason to tell their friend not to date a guy, like he's a manwhore, and sleeps with every girl. Now even these, shouldn't be deal breakers. Just reasons to think about before making your decision for yourself. But from what I have seen, a lot of the times, a girl will break up with a guy because their friends just don't like the guy. Maybe the guy and her friends personalities just don't click so they just can't get along. Now that is an extremely weak reason to break up with a guy, when it comes to because your friend doesn't like him. There should be solid proof, and a very good reason for a friend to say no you shouldn't date this person. Not simply just because they don't like them for their own personal reasons. Now that is just selfish and immature.
Now, I am not saying all girls, hell not even most girls. Just most girls that I have met personally. If their friend doesn't like you, for petty reasons. They will break up with you. Stupid I know, but it's the sad bitter truth. What you should do is be nice, and thoughtful of her friends as well. Listen to them, and for the most part agree with what they say. If you get into arguments with her friends over silly things then they will start to not like you and then it will just be a bumpy road from there on. So until you know her friends better than she knows her friends. Just agree with them. Now don't just agree with her friends none stop, you can still have a backbone, but when you do disagree, don't make it a big deal. Just state your opinion and leave it as that. Respect her friends, they will respect you, regardless if they like you or not. And if they respect you then they will, for the most part, not tell your girl to break up with you. Show her and her friends that you care for her and will walk the extra mile, on your hands, over glass for the girl. Just got to suck it up right now, and meet them. For all we know, you might actually get along with these girls. Well I just wrote my first book, hope you had fun reading it haha. ANd best of luck to you man.