<human>: my girlfriend of 2.5 years [F/20] and me [M/20] have probably been arguing more severely last week. (Wednesday-Friday)

Saturday she told me she wanted a day to herself for Sunday. We had plans for the weekend and everything was shot, so i was a little bummed, and she's never asked for a day away in the entire relationship.
I went over Sunday night after I couldn't take being away from her around 10:30, and we ended up talking and crying until 2:30am and she was sure she wanted a break and reevaluate. she told me she was unhappy with the way things were, and that we were too involved with each other, and that we don't do anything really anymore. She also told me that this wasn't something she had been planning.

After crying and just cuddling and things nothing felt like it was gone, the feelings were all still there, and it's obvious we are still in love, we even kissed, and i had asked her one last time?, but she said it would be a bad idea. so we didn't. but everyfuckingthing still had that spark, the love is still there.
I'm just so confused how all this can just end so quickly. She hasn't really talked to me since, and I'm trying my best to not talk to her as well.

it's terribly hard, and every little thing reminds me of her.
you have to understand that since we were together we haven't really spent more than a week and a half apart. and haven't not talked to each other...the entire time we've been together. We had also lived together, (complicated but we did on and off).

It was all so sudden. There was so much time and energy and love invested. I know every tiny little thing about her. And for all I know, she may be gone.
I'm trying really hard to give her space. It's all everyone is saying to do. I'm just worried that she won't come back, that her friends are going to talk me down, and that she'll think differently about how she truly feels.

Can you provide a brief overview of the text?
<bot>: GF of 2.5 years left me sunday, and wants space, and I need help trying to accept this.