Hey man, i'm not great at this stuff but my advice would be as follows. Cut the weed down now. Thats gonna fuck up having motivation to do anything. And it fucks with the chemicals in your brain which can create anxiety and depression. Start with little steps. Maybe if you have two spliffs a day try one a day for a week then one every other day. What ever you feel is doable but make sure you write down your plan before hand and stick to it. Second i would suggest a sport/exercise. This helps with motivation and gives you something to work for and improve at. If you are anti social atm probably stick to something like running though climbing for me is the best. You are constantly improving yourself doing it, you can do exercises at home wen you cant get to the climbing wall like chin ups. And you feel like a boss when you finally do a climbing you couldnt do before. Thirdly what I think is really important is eating healthy. Learn about healthy foods and how to make healthy meals. If you eat loads of carbs everyday you are gonna feel bloated and tired all the time so get lots of dark leafy greens, oily fish etc. with the school thing if this whole year is screwed grade wise then dont bother with school atm and work on yourself and then re-do the year next year if thats possible. Sorry about spelling and grammer but im on my phone and im hungover. Next would be some tough love. Nobody owes you anything. If you dont fix yourself nobody else will so you've gotta just man up and work on yourself. Dont expect it over night, it will take time and it will come in the form of peaks and troughs ao just push through times where you feel super shit. Next I think you should learn how to be emotionally self sufficent (impossible to be totally like this) and realise you wont find happiness in women but only in yourself though i do understand how shit what she done must make you feel. Women should just add to an already happy life you have, they should be your crutch for it. Once again sorry for this being written to badly and hope anything here helps. And dont think any of it is being mean I just know how easy it is to become caught up in thinking of yourself as the victim where, this is no beneficial to improving yourself.