In my opinion you should not contact her. You seem to me to have a problem moving forward about anything, as if you cannot leave the past behind in any regard. I find your not having completed your degree a sign of that.

She has moved on and the fact that you're still where she left you says you're not ready yet to catch up. I would suggest that you forget about relationships with her or anyone else period and work on you. Get that degree. Find a job you really care about, one you'd miss if you had to stop doing it. Start living.

If she's meant to be in your life, she'll find her way back once you become someone she could be in a relationship with.