Your profile says you are 23. You hadn't dated anybody before her since high school. Neither had she. People do stupid things in high school, like take back cheaters etc. because as they are growing up they don't always know how to stand on their own two feet. Because of all the changes that take place emotionally & intellectually between your teens & lets say college graduation age (early 20s), once you are an adult, some of your dating history doesn't carry that much weight.
You say that this surprised you & I'm sorry for that. I know 1st hand how devestating having something like that come out of left field can be. Many years ago, my then BF -- a guy I thought was The One -- broke up with me out of nowhere. The night he did it, I honestly thought he was nervous because he was going to propose. Boy did I read that situation wrong.
She said she wants to be "single". You have to take that at face value. In the wake of her parents' divorce her entire belief system about loving relationships & happily ever after has been rocked off its foundation. She is afraid to believe anymore. You can't fix that or change it. You can't love her through it or reassure her, as much as you may want to.
If she is the nice person you believe she is, I suspect she does think about you & is sorry that you are in pain. However that doesn't translate to wanting you back. It just means that she isn't a jerk.
I will offer you 3 things that helped me through the break up I told you about
:
1. I convinced him to ease me into it. I had gotten so used to talking to him every day I was freaking out about going "cold turkey" so even though most people recommend no contact in the immediate aftermath of a break up, I convinced him to keep talking to me. I promised no drama & no begging, a bargain which I kept. We negotiated a schedule; I could call every other day for a month. At 1st we'd talk for 5 minutes, the next week was down to 3, then 2, then 1 minute that last week. I had been prepared to try to negotiate once per week for 2 minutes if I hadn't been ready to let go & admit defeat at the end of the month. We would talk about the weather & our days but I kept my end of it & didn't beg him to take me back. I may have slipped in a few "I miss you's" but for the most part it helped me break away.
I do not reccomend this approach for most people but we both knew I was too proud to beg for a reconciliation so this became a way for him to ease his conscience after hurting me & I had a way to "save face" & play it off as more mutual (even though a few close friends & family knew the truth)
To this day we can be civil when we bump into each other which happens about 1-2x per year because we're still in the same profession.
2. I gave him a mean nickname. I started calling him D!ck Head when talking & thinking about him. In my mind as a matter of self preservation anybody who would break up with me had to be a jerk. (no, my ego is not really that big, but it helped). It became a joke because one of my colleagues told me I couldn't call him such a vulgar name in mixed company. The colleague renamed him Richard Cranium. It made me smile for the 1st time in a long time but that was a start. I also put his picture on a dart board & threw darts at it over the course of several weeks until I obliterated his face. I may have shredded a T-shirt he gave me too. Nothing too distructive or criminal.
3. Finally I played head games with myself for several months. I said OK, I'm going to go a 1/2 hour without crying. Then and hour, then a 1/2 day, then a whole day. I didn't aways make my goal. But once I reached the goal for a whole week, I'd increase the time. Sometime after I was able to go a whole week without crying, which candidly was several months later, I was able to stop playing the game. I know it's silly but it helped.
You are in the immediate throws of this. It's a loss. It's painful. You are entitled to grieve. I recomend drowning your sorrows in ice cream. You can use adult beverages
once. . . under close supervision from your BFFs who will prevent you from drunk texting / calling and/or otherwise hurting yourself. No drinking & driving; avoid alcohol poisoning too. using booze is bad because it can become addictive but if people didn't try to drown their sorrows, we wouldn't have country music.
At some point everyone gets their heart broken. You don't believe it now, but you will survive. Lean on your friends & family but let her go.