<human>: Give me the gist of the text in a nutshell

She was really nice to me for a while. She laughed a lot with me and seemed excited whenever she saw me. All I've wanted for the last few weeks was to go to school so I can see her. She motivated me to start exercising as well.

The last few days before winter break, however, everything changed. She stopped paying attention to me. She even asked if we could get new lab partners in our chem class (we're lab partners). This crushed me. Really bad. She doesn't even talk to me much the past few days, just her other friends, and she gets irritable around me easy. I thought it was me and I was nothing but nice to her. Not overly chummy either.

The worst part is that she seems interested in a drug dealer, my drug dealer. I started smoking weed because of this depression and I got caught, which made everything 10x worse.

Now it's winter break. I'm alone and my chest feels incredibly heavy. All I can think about is her and how she won't feel the same way I do for her. I have no motivation to exercise or do anything. I have a long two weeks ahead of me and I have no idea how to get through it.
<bot>: A girl showed interest in me and got me to like her ***a lot***. All of the sudden she lost interest and resented me, and is now hitting on my drug dealer.