Lately I have been feeling like total and utter shit. I have irritable to people and i have been very anxious. I dont think this is normal for a 13 year old. I mean, I just am not into anything. Ive used drugs now and then and I just...gah. I am just always feeling like shit and I dont know what is wrong with me.
Actually its the opposite of what you said. It is very normal for 13 year olds not to be into anything, to feel out of place, to be anxiety, depressed, and a whole slue of other emotions that come rampaging towards you. This is a time of pubery which means all these hormons are comming from all over the place. These include the pituitary gland, the adrenal glands, and of course the gonads. You are becoming self concious about a whole bunch of stuff so of course things makes you feel different and out of place. All the things you were interested in childhood now don't interest you because you are too old and have grown out of them, sad but truely enough the things that you probably stimulate you mind and what not you just have not had the opportunity to encounter. I was just like you all through middle school never really wanting to do anything, nothing interested me, and I felt so weird but pretended to be fine. Once highschool came everything kind of fell together fairly well. I wouldn't really worry about it or get to worked up because its just being a normal kid.
I would stay away from drugs when feeling like this since they may contribute to the confusion you're feeling. Consider this a phase, where many people feel like this and experiment with different things. This is when a person your age is at risk of getting into bad habits. Save yourself the hassle and realize you'll survive with just yourself being in control of your life. Write a song.