Single mom trying to work with an inconsistent father

by Ashli
(Yuma, az, USA )

I am truly trying my best to work with my child's father. However, I believe there may be better ways to do so.
I know my son's father loves him.
He promises many things and doesn't follow through with them.
He doesn't really ask for many weekend with him even though I do offer and I am totally okay with him taking him. When we do plan for a weekend many times he cancels ask for the next weekend and sometimes this goes on for a month or so. Its frustrating to me because I can't make any plans for my weekend without my son. Do something nice for myself. I know as a mom my plans do revolve around my son. My son always comes first. I do sometimes want break. I currently live with my mom since we split until I can buy a house. I have been trying but the housing market is crazy. So my mom is not typically willing to watch my son unless I have an appointment. Or in serious need of a baby sitter do to illness or something of that nature. I do not get anytime to myself except when he takes my son. However, it is unpredictable and always rescheduling. I know he is irritated when I try to talk to him about the unpredictability. I am not sure how to approach this in a better manner. I am not typically angry when I talk to him about it. I try to stay calm and understand where he's coming from but I do not get clarification. Just short answers that seem irritated as if I am inconveniencing him. I am trying to create a good relationship between the father of my son for my son sake. It is hard I am struggling to keep my feelings aside from our conversation. Is there anything you can suggest to make this transition better for the two of us?