If this is in the wrong place please move it for me
So this will be long,
So my history with this girl is a bit weird in my opinion. I had a dream in grade 9 about a girl and we really hit it off, though I had no idea who it was. i hadnt had a relationship really at this point so it was a strange feeling for me. fast forward to highschool, first day of grade 10 art class, I was looking around to see my new classmates and low and behold there she was just sitting there. For that whole year I never really thought about her, but one night during the summer I went to a party and she was there. We started talking and hit the ground running, I left early with my friend and she told him to give me her number, so we started texting, became best friends and almost a couple. We went to the city's park together for walks, to concerts, to parties, etc. we'd stay up every night talking to each other. Now the hitch here is she gave me all of the signs she liked me, and I gave them back but never acted on it. She would kiss me on the cheek, hang off my arm in public, sit with me/sit in me, hug me everytime we'd meet. I would compliment her, carry her things if we were going to class together, open doors, buy her movie tickets or lunch/dinner. I think we were at the point where we were both fully aware of how each other felt but just too nervous to act. Then came the fateful day in grade 12 when another guy asked her out and she said yes. I was crushed but i like to think I'm pretty strong so I just kept on keeping on. I figured at that point I had missed my chance, but everytime they'd be around she would act unhappy with him, or push him away when he'd kiss her in front of me, almost act like they weren't actually dating. Still I was really hurt and blamed myself for taking too long, I was very depressed and basically sat at home doing nothing for a few months. Then I decided I need to move on, so I got up and decided to cut off contact with her. We met at a few parties and she'd ask why we didn't talk as much anymore and why we'd grown apart, i told her i didn't know. It was hard but I found myself a girlfriend, who went to prom with me and we dated or two years. All was going fine but about a year and a half in I had another dream about this girl and when I awoke all of my feelings came rushing back to me. What's worse is that all of my feelings for my current girlfriend went out the window, almost like she was a rebound and I suddenly realized it. I tried for 6 months to fix it but it was over and eventually I gave in and ended it. A few weeks after that ended I found another girl and we started dating. Now fast-forwarding to my current situation. We fight and don't get along about 30-40% of the time, we live together but I feel like its too much and want to move out, and a week ago I had yet another dream about this girl having almost the same effect in this relationship. I still care about my girlfriend but I'm sad about this other girl and its one of my biggest regrets in my life.
So now this is my dilemma, I've decided I will contact this girl via facebook (only way i can really) but I'm not sure exactly how she'll feel. I would like more than anything for us to be friends again and I'm not really interested in rekindling our relationship any further than that. At least not while I still care about my girlfriend. I was thinking something like:
"Hi there, it's certainly been a while. I'll just be blunt, i feel like I owe you a much deserved apology for the way I treated you at the end highschool, I don't expect forgiveness or anything, I just wanted to make the gesture."
Now the problem is this might come off as sad and if I want to rekindle the friendship I don't want that, who wants to hang out with the emo kid?
Anyways I'm set on messaging her so my question is:
How should I do it?
Ps. I don't want to say I was just browsing and came across her profile or something like that. Something a little more meaningful so it makes her think rather than glancing over it and ignoring it.
Thanks!
Pss. Who am I kidding I still love this girl, I haven't felt the same way about either of my other long term relationships. Though I am prepared to be turned down I'd still like advice.