Many people want their partner to have certain degrees of unpredictability going on about them. No one likes to have to talk about and do the same things on a day by day basis, which is why unpredictability is always ranked as one of the most sought-after factors of attraction. However, if your relationship seems to be completely out of control, with you not knowing what is going to happen the next day (or the next hour), that could be a bad sign.
All happy and healthy couples have routines and daily habits that keep them together. If you don't have anything like that happening in your life, you should definitely start working on incorporating such habits. To do this, you need to have a heart to heart conversation with your partner, in which the two of you are going to talk things through, and decide why your relationship is getting out of control.