Sad about a break up

I messaged an old crush from 15 years ago on Instagram, and initially, she didn't recognize me. After blocking and then unblocking her, she finally responded. Now in our 30s, reuniting felt as magical as our college days, nearly moving me to tears. I couldn’t believe the most attractive girl on campus was sitting in front of me: However, her approach was more logical, which was understandable since I was the one harboring a crush, and she hadn't known me before my direct message. Timing wasn't on my side, with the end of the year project wrap-ups, random family issues, and PSC stuff getting in the way. My responses to her messages were often delayed or lacked enthusiasm, especially regarding phone calls, due to my tight schedule. Despite this, she was incredibly understanding, which impressed me. She hinted that our situation was unusual for her, as she was accustomed to a whole lot more attention and pursuit from guys. My response was to question how those past interactions had worked out for her. Everything seemed fine, and she was understanding until one day, she called me, crying and accusing me of treating her like shit and being a robot void of emotions, during a three-hour conversation. Apparently her therapist confirmed I was a hidden douchebag/player etc It was difficult and shocking because I had just made the conclusion how amazing and beautiful she was, and I was on the verge of committing to her.