Search Results: long term crushes

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.

I asked out my crush at work and she had said yes. We went on one date and it was ok, but nothing crazy. Then she asked me to participate in a double date and at first I said yes, then I decided not to go.
She was upset and she didn't speak to me for a month. Then she finally started being flirty and normal again. We went out one more time, and it was better, but not great.
At that point, I found out she was casually dating another co-worker and I decided to not ask her out anymore and she got upset and the guy was upset for some random reason.
I tried to leave the company not too long later, and leave on good terms with her but she told me to pound sand.
About 3 months later, she friend requested me on Facebook, and after a week messaged me. She wasn't seeing that guy anymore. She wanted to try again and if it went well be exclusive.

Why is she ok with this now?
Should I be ok with it?