What can you say when someone insults your choice of friends?

<p><a href=“http://talk.collegeconfidential.com/college-life/692451-proper-way-tell-people-i-dont-want-their-friendship-without-offending-them.html?highlight=Lakrosse[/url]”>http://talk.collegeconfidential.com/college-life/692451-proper-way-tell-people-i-dont-want-their-friendship-without-offending-them.html?highlight=Lakrosse&lt;/a&gt;&lt;/p&gt;