Mixed Feelings

Hi, my coach is leaving. I’ve been with her for 3 years now. The feeling is anger but I don’t know why. When I think to myself I say it’s her life she can do whatever she wants, but when I remember that she said she will stay and we were planning to have our gym I feel uncomfortable feeling, and what is annoying me more is when she says “I’ll be back when you’re done with gym, I’ll come and work with you.” I really don’t know what to say, what to feel or how I respond to that. I don’t know what to think, feel, or react to this situation but I’m hurt and shocked.