You could always just try and tell them, if they’re really your friends I’m sure they’ll try and work things out with you. But second of all, your not dumb and please don’t think that, I know it sounds stupid or cheesy to say we all grow at our own time but that’s true, we all have different ways of learning and some people just haven’t found what’s right, so whoever you are I hope your ok, just no nobody expects you to be perfect or smarter than anyone else.