Already being.a regular user of weed, I'm guessing the stresss of moving in the middle of your junior year naturally increased the drug use. The drugs would have done this, malsypals ... You just had to show up to get sucked into this dance.
Having your horses taken away may not have struck immediately in your drug fog, but I imagine at a deep level the pain was great. This is the web if addiction, and I'm sorry you're trapped in it. Horses make such special bonds with us,
Madisgram has offered some initial wisdom. I hope you will post here often.
Roadie