I would think the balance would be you respond when you feel you should, meaning not being a doormat.
If she text you and ask "are you there" it is up to you to decide are you? Take a few minutes to decide. If you don’t reply and it is important enough she will make it known.
If you respond and it turns into something that isn’t healthy or doesn’t go anywhere, then you can always say I gtg, have a great day.
If it becomes a conversation that she expresses herself, feelings than you can listen and validate her if you want.
Figure out what you need for yourself to feel good about how you are living and handling yourself, then follow what you discover.
M46,W41 D16,D18 M22,T25 BD 11/12 W moved out 01/13 Piecing 10/13 Divorced 01/15 "Whether you worry or not has no affect on the outcome. But, moving forward, letting go, and making changes can." UrWorthy