<human>: Can you give me a shortened version of the text?

Im 20M btw, I made a mistake in title
I would like to start off by saying I know I fucked up. I have been living with my girlfriend for a year now, and I've had issues with smoking weed. During my junior year of high school I got kicked out of school and sent to a continuation school because I would ditch class to smoke weed and drink with my friends. When that happened, she got super angry at me and told me to stop smoking weed and she'll help me get my shit together, which she did as thanks to her I graduated. There's was a couple instances where we've had arguments over weed, and last time we had an big argument in which she gave me an ultimatum. If you smoke weed again, we're done and you leave the house. I would like to note that I don't pay rent at her place as her father pays her apartment while she goes to college, but I do help out with grocery and some bills.

 We had an argument unrelated to weed yesterday afternoon, and it was so bad I decided to leave to my brothers to cool off for the night. He had friends over, same friends I went to high school with, and they were all passing a blunt, and they kept telling me "take a hit" so I stupidly said "f it" and smoked with them. My girlfriend has my brother on snap chat, and he recorded us and put it on his story, so my girlfriend found out that I had smoked with them even after she gave me the ultimatum. She went on rage mode and started texting that we're done and that she never wanted to see me again. When I got home early in the morning the next day, my clothes and belongings were all packed and in the front lawn. I don't know where she is and she won't return my calls or my texts and I'm loosing my mind. I know I seriously fucked up by smoking even though I knew her ultimatum, and thanks to that fuck up I am now homeless and girlfriend-less.
<bot>: My girlfriend kicked me out and broke up with me because I smoked weed after she gave me an ultimatum. I am an idiot and I give into peer pressure.