Did I tell you I plan to hang out someone who my friends don't want me being friends with?
What's their problem?
I'm not willing to listen to my friends, I won't change my mind.
Without good reason, your friends have no right to tell you who to hang out with. It's ultimately up to you who you want to spend your time with.
I'm going to do it anyway, fuck my friends
Before blowing them off entirely, you should ask them why they have a problem with this person. If it's something trivial like they don't like the way he combs his hair, it's their problem, not yours.