Ups and Downs

I'm kinda mad, but at nothing. The thing is me and what i consider to be my closest friends are hitting bumps on the road. There is something wrong, I don't know what it is but whenever I ask them they say its cool. But I know something is up, cause I'm not an idiot. I want them to tell me the truth but I just don't know. I told my mom she said ignore it. She doesn't understand that they are my closest friends!!! AGHGH!!!!! What do I do??? I'm confused and I really want to fix our friendship. If its me, I am willing to change for them, cause they are my friends. Well got to go do a Spanish portfolio.