It's a love-hate type of thing.

     I know everyone always says that you should tell your friend if someone their dating is totally obnoxious and what not, but is that really necessary? Here's what I think:
You don't have to like every person your friend goes out with, but you should like what they do to the friend.  Each person has individual quirks, pet peeves, and obsessions; it's natural.  So just because your likes and dislikes don't match up perfectly with those of your best friend, that's not an excuse to bring them down every chance you get.
      My best friend in the whole world is currently in a relationship with this guy who she met at a dance.  Now I have personally gone back and forth on this relationship more times than a ping pong ball during a really intense game.  He's not my favorite person in the world and I have never really refrained from making my feelings known (in my defense I think she deserves something along the lines of perfection); until now that is.  While thinking about the things that make me dislike him I realized this: he isn't forced to like me just like I'm not forced to like him, all we're required to do is like my friend.  When I took a step back I thought about how happy he makes her (most of the time) and what a good person she has become because of all the things she has learned while dating him.  That's when it hit me that I do approve of him as her boyfriend, I may never want to be friends with him, but I do approve.
     It's weird the way friendship works, you define the standards for someone else's happiness.  When you meet someone who has changed your life, all you want is the best for them; you have to realize however, that your best and their best are two totally different things.  Ultimately, as long as they're happy in the moment with how things are, you should be grateful to whatever makes them this way.  That's how I am.  I am grateful that my friend is happy and I am grateful the he makes her so.  I'm grateful that she met him and I'm grateful that she has thus far ignored all the rude things I have said.  All in all, whether I can stand him or not, I am grateful for him, and that's all that matters.