Incidentally, I've lost many friends over the years because I'm far more interested in being rigorous about beliefs and evidence than they are comfortable with.

(This isn't the same thing as seeking truth; I'm usually far more interested in working out what follows from a belief in X than in working out whether a belief in X follows from observable data.)

I've also lost friends because of activities they're really interested in that bore me to tears. These things happen.

But I've also made a great many friends for whom this aspect of my personality is a large part of what they like about me. And I don't regret the trade for a moment.

So when I find myself feeling like I have to choose between being true to myself and having friends, I generally conclude that my best bet is to seek out better friends.