I have friends that are super liberal and atheist. While I am pretty sure they make fun of my faith behind their back (quid pro quo, I make fun of theirs or lack thereof, too), we can have serious discussions and they are always respectful, as I am of them when we are together. Of course we crack jokes and we both know how the other one feels about other religions and such, but our joking rarely crosses a line.
I love them as people and they love me as a person. And if that will be another opportunity to share my faith while enjoying a wonderful friendship, I'll take it.
But if they constantly made fun of Christianity, I just couldn't be friends with that person. That's not even "tolerating" my faith, or if it is, just barely. I can be a good acquaintance or co-worker, but I couldn't see spending hours with someone who wasn't polite enough to disparage my lifestyle and faith all the time.
Most of my friends are either apathetic, atheist, or agnostic. My relatives ridicule my faith, but as Liza says, you can't really do anything about that. There are people who believe differently out there who will be good friends to you, and I pray that you will have good Christian and non-Christian friends.