You could jeopardize your career- even if dating a former student isn't against policy, it's certainly something that could be considered questionable conduct.You don't want you bosses to think you're using the student body (bodies) as a dating pool.Therapists, therefore, make every effort to avoid conditions and multiple relationships that could impair professional objectivity or increase the risk of exploitation.When the risk of impairment or exploitation exists due to conditions or multiple roles, therapists take appropriate precautions.
The last thing you need to do is risk all that for a piece of you know what.
If the student changes colleges just so that they can date the professor, then it calls into question when the relationship actually started.
If the relationship in any way had a detrimental effect on the student’s progress (which could likely include transferring colleges), that can be grounds for dismissal of the professor.
She seems mature and responsible, despite the fact that many are not at 19 or 20. Now, It IS OUT of the question to even considering anything while shes still a student. Technically, you could have lunch with her after graduation, but I wouldn't do anything more with her until more time as gone by.
There is that boundary between students and teachers. 27 and 19 is a big age difference, but like I said she seems more mature. Students frequently develop crushes on their teachers. If you truly like her, keep it a platonic friendship for at least a year and make sure it's not just a light student-teacher crush.