I'll go ahead and change the scope a bit: Is it important to have friends who are as intelligent as you? To this question I'd definitely answer with a yes. A rough one of course, no need to compare IQs... But I think it is very important to have people around who can understand you, or you'll kinda always feel lonely and not understood, no matter how many friends you have (who don't understand you). This of course can also happen if intelligence is there, but communication of what's important is not.
If you have friends like that, maybe even only one, then you're alright. All other friends can be dogs, cats and mountainlions @Zen00 :yum:, no need to match any intelligence standard.
The most important thing for me in a friend is trust. I need to be able to trust them. The more I can trust them, the deeper the friendship can be. To be trustworthy to me, you'd need to be confidential (e.g. never talk about my secrets, and that's that), you need to share some very important values with me, you need to be kind towards me and others, well and we should have something in common to do or talk about. Pretty simple actually, but hard to find.