((Ryask)) - I know the feeling of not being able to hold back the tears - it happened to me at the doctor a couple weeks ago. I think you boss seemed very compassionate for asking if you were okay and giving you advice. I think the best thing to do is, either briefly thank her for being helpful / understanding and that you were very overwhelmed with school or give her a nice thank you card with the same explanation. I wonder if she's a mother because she's sounds like a nice lady. Don't feel embarrassed - sometimes the tears flow at inopportune times...you're human.