<human>: Can you provide a brief rundown of the text in within 3 sentences?

So I was with this girl in high school. I was head over heels for this chick. We were together for my entire senior year (which I still consider the best year of my life).

I had plans to join the military after highschool (which I did) and she didn't want me to. I did anyways. We broke up and I was never the same since. 

That was 2009. It's now 2014 (duh) and I just got out of a long relationship with a girl that I met in the military. It was a mutual thing, we are still friends. I'm good, she's good, it's peachy.

A few days after the break-up, my ex from highschool messages me on facebook. I figured it was to good to be true, so I did some creeping and all the evidence pointed to her being single. I was ecstatic because this whole time she had always been at the back of my mind. I constantly thought about her. I guess you could say that that was the reason it didn't work out with the military chick, I still had feelings for the highschool chick.

Anyways... we are talking and joking and all that nice jazz for about a week. I never asked her if she had a boyfriend because you don't message an ex-bf for a week straight during all hours of the day and night if you already have a bf. I was wrong. She mentioned him off-handedly as if I knew the whole time that she had a bf.

It's like I'm in highschool all over again. Pining over a girl and feeling the butterflies and all that bullshit. I even have the GooGoo Dolls on repeat and everything. This fucking sucks.

I don't know what to do.

Thanks in advance to anyone who took the time to read this.
<bot>: I broke up with a girl I was with for 3 years. My ex before her convenliently messaged me on FB soon after. She has a boyfriend but I think I still have feelings for her...