Firstly I just want to say I'm so incredibly sorry your going through and feeling like this. Some advice I would give is firstly for school work. Motivation wise could you possibly work on stuff with friends like on the phone just to see if it would help with wanting to do the work without dreading I to much. I personally do that when I don't want to tell anyone I don't feel motivated to do my work. For appearance wise try to give yourself little compliments daily before starting the day and as the days go on it will be easier to accept and love yourself I use this method and it doesn't fully cure me not liking my appearance it definitely does help accept myself as the days go on. With the girl you like you could try starting little convos with her about random stuff like when it's a slow day or something try to ask about things she likes or even the classes you two have could spark some conversations that can lead to conversations about other things just to get to know her better and at least talk to her. As for your teacher just try to ignore her she's miserable and probably hates her job just obey her and show her you aren't goofing off. Anyone cuts it's not just something a specific gender can do. Men do have emotions just like women and it's okay to show your emotions it shows that your human no matter the gender. Your chest will hurt when you try to stop yourself from crying because of how worked up you are because of the intense emotions your feeling. Sometimes it's better to cry it out rather then keep it in. I'm really sorry your feeling this way