TW: emotional abuse, suicide, death, sexual assault

A lot of bad things happened in the summer of 2018, and something just weird happened to me. I explained it one of my friends, and she told me I was dissociating. But, what is that? Is it possible to dissociate for almost 6 entire months straight? 

2018 was the year I graduated high school. I was in an on and off relationship with a boy since the first week of Freshman year. He was emotionally abusive. He'd constantly threaten to kill himself and at one point, even tried to convince me to commit suicide. We would go on an "off" period, and he would tell me about his new girlfriend and how he loved her move than he would ever love me. In January of 2018, he... didn't understand that hysterically sobbing and shaking did not mean "yes". Yet, that wasn't my last straw. In fact, I didn't even realize what he did to me. My last straw was two weeks before graduation when I saw him holding hands with another girl, despite professing his love for me the night before and telling me that he can't wait to be with me. And that was it. I confronted him, cut him off, and never talked to him again. 

It sent me into a spiral, and I started piecing together what actually happened in January. Before I just-- I didn't process what happened, I guess, but once I analyzed it and took a step back, it was like everything came crashing down. I was a mess. 

And then I graduated. The college course I was accepted into included a built in gap semester, meaning that all my friends would go to school in Aug/Sep but I would leave in January. 

So I filled my time working a total of 5 jobs at 65+ hours a week while taking online classes and volunteering. 

And then we had a party. And I got extremely drunk. I don't even remember what happened. But the next day, one of the guys from the party (who I thought was my trusted friend) texted me and told me that he had to, and I quote, "fight the urge to rape \[my\] drunk body". 

And then. My childhood friend passed away. 

And then all my friends moved away in the fall to go to school. 

It was like everything was hitting me all at once and I was falling apart at the seams. Like, I couldn't be in control-- I didn't want to be in control, so I just wasn't. I just wasn't there, in my body. I was in the passenger seat while someone else was driving. And I-- if I'm being honest-- barely remember any of it. Just little snippets, but those memories are like I'm looking in from an outside perspective. They're not from me. It's like they're not my memories. 

My family also has mental illness on both sides: extremely severe depression, anxiety

TLDR: A lot of bad things happened at once, and I don't really remember it.

Is this dissociating? Is there a name for this? This was over the course of many months, so is it even possible to dissociate for that long? I just want to figure out what happened to me... It's like I'm missing an entire half a year of my life. And tips or advice or anything would help. Please.