Another thought--and this goes along with what others have said--you might be okay with viewing the friendship in the now, but when it comes to the future, not so much. Sun and 4/Wands are "now" cards. Today. Note how the Sun often features a happy child in a garden. The idea of a sunny day, youth, everyone reasonable, everything right with the world. 4/Wands is about that moment in building something when you come to a plateau, take a breather, celebrate.
The "now" is going well and everyone's happy. You'd rather not think about the future as you're afraid that all this good stuff is going to go away. But whatever went wrong in the friendship (or right) the 4/Wands says that you're not finished working on it yet. This is a good moment, and a good step you've taken (whatever it is), but there is more yet to do. You can't be so afraid of the future and, especially, so afraid that there might be no good end to it, that you stop working on it and try to keep it in a perpetually sunny, but incomplete stage. Eventually, the happy couple have to start living as man and wife, they can't stay at the wedding.
You're afraid that this all is going to end. But it isn't true friendship if it only exists when the sun is shining and everyone is celebrating. It's easy to be friends when the world is like that. If things get dark, is there a light to guide this friendship? You can't live in fear of the future.