things can only get better. you've gotten past this point before and i'm sure you can pass it once again. for now, all you can do is cry it all out and get it out of your system where you have no more tears to shed and you become tired of wasting your sadness tears and everything on him. the rest of us can only be a shoulder for you to cry on. no matter what we say it won't make the hurt go away, no matter what we do that person will still be on the back of your mind. so all that is needed is either a rebound =x for distraction or to live with it till time heals the wound. you've had a slip up and even though you thought you could handle it you couldn't. saying i told you so isn't really going to change anything so hopefully this is just another mistake you learn from. i know his attention and presence makes you happy but that happiness won't last and i think you know that now. you have said you're stupid which i do believe you are at times but when it comes to your heart and your love nothing can stop you.
just breathe. it'll hurt. but you can only get stronger from this.