Thank you for the honest answers and I think it's great you working on the issues with a therapist.
Ultimately your fear of abandonment caused you to hold on too tight in your relationship which caused you to act desperate and needy which drove her away after 2.25 years. Just reaffirming your fears. ([censored] how that works) Then she goes out for a run and you just by chance run into her and then text her later to go out on a date. She starts to feel like you're suffocating her again so she backs off and doesn't respond.
Again, its best if you recognize the dynamic while your working on it in therapy and give her as much space as you possible can. She will not try to reconnect with you again until she feels that it is safe.