Jon Kleinberg, a researcher at Cornell University, and Lars Backstrom, an engineer at Facebook, recently posted this fascinating paper, “Romantic Partnerships and the Dispersion of Social Ties: A Network Analysis of Relationship Status on Facebook,” on the open-access science website arxiv.org. The researchers analyzed a large dataset of over 1.3 million Facebook users listed as being “in a relationship” and then used the concept of dispersion to measure the probability that any given couple might break up.
In summary, couples with high dispersion have mutual friends who are not well connected, while couples with low dispersion have mutual friends who are well connected. The researchers found that the more well connected their mutual friends were, the more likely they were to break up. That is, if you and your partner share the same social circle on Facebook (low dispersion), each partner is less likely to have his or her own life and the relationship is thus more likely to implode.
What do you think?
prior probability 
I agree. Low dispersion seems to cause friends to think it is acceptable for them to interject themselves, and their opinions, into a relationship that is meant to be shared between only two people. From my experience and observations, the couples I have come in contact with that maintain their own lives and spend time together, without involving a large social circle, appear to be happier and have long-lasting relationships. When dating relationships are new, the more the friends are involved, the less successful the relationships will be. This is simply because the dynamics of the friends and their quirks usually end up causing problems where there would not be any if it was left up to the boyfriend and the girlfriend alone
I also agree. My grandmother has always told me not to mix my friends with my boyfriend. Not only because you can’t really trust people, but because regardless of how serious your relationship is you need space. I have noticed that while having your friends like your significant other makes life easier, that does not mean that they have to be friends. As long as respect is present, the rest should not be stressed. Lets be honest every relationship has its problems, and once things go rocky in a relationship the common friends are likely to form their opinions and grow sick of dealing with the relationship. Seeing so much of two people, and their issues, is likely to sway friends towards certain opinions. Once those opinions are formulated, it is likely the relationship will go downhill as they will likely influence you to separate.