Search Results: crush on a girl with a boyfriend

So, long story short. Through Junior High and Highschool, I had a crush on this girl. But I guess she didn't care enough to be nice and say she wasn't interested. So she and her two best friends pretended to like me and mess with me daily.
Even when they had boyfriend's, they'd join in and sometimes beat me up.
But towards the end of the high school they backed off, but still did it a lot of times.
It's been 5 years and the girl who started it, requested me on Facebook.
Should I accept it?

Basically, this friend of a friend (let’s call her Mary) came to a graduation party we were hosting at my apartment. I hadn’t seen her since the last time she came to visit my roommate a few years ago, which was also the first time we met. Back then I had a crush on her, but right after that we both got into long-term relationships. She shows up to our party and starts acting weird around me the whole time. I’ll go in-depth about the specific moments, but keep in mind my girlfriend is at the party and her boyfriend isn’t, as he’s from where she lives (different country). She started our conversation by asking me about my musical interests and so we chatted about music and stuff like that. I noticed she started fiddling with her hair and maintaining strong, prolonged eye contact while we’re talking. She’s also standing pretty close, closer than I’d expect in a conversation between two taken people. When we broke off, she often stared at me as I was talking to friends, even while she was mingling with other people. When I’d meet her gaze, she’d continue to stare and smile until I broke eye contact. A little later I hear from my girlfriend that Mary has been talking to her about how nice I was to her a few years back showing her around town, which was no doubt influenced by how I had a crush on her. Mary would also do things like jab me to help me out when I wasn’t paying attention during a drinking game and laugh at all of my jokes. When it came time to walk to the club, it was raining, and I got wet along with everybody else. She turned to me and said “you’re so wet” and brushed off the rain from my chest and arms (my girlfriend was in the bathroom when that happened). Later on in the night when I was dancing with my girlfriend and being affectionate with her, Mary kind of stopped acting the way she did earlier that night. The next morning when she said goodbye to my roommates and I (she spent the night), I was the only one she hugged besides her friend.