I have a friend that is constantly needing my help and is emotionally manipulative. I mean she does things such as say "I need space for 2 weeks before my new job" and then when I call 2-3 weeks later she says "finally, I thought you'd never call".
This is very annoying behaviour and certainly does not help our relationship and does not make me prone to answer in a timely manner. Sometimes I wonder if I am a true person to her, or wether she just needs more emotional support than I can currently give, because I also have issues I need to talk about and it's about her 80% of the time (same recurring issues).

Not sure if your situation is the same, but I recommend you make an effort to aim for a more balanced approach and forgive her not answering 3 days in a row. Maybe she has stuff going on and just doesn't talk about it as much.