How to deal with a part time lying "dad"?

I got pregnant 3 years ago. I tried to be with the father during the pregnancy and a year afterwards, but he wasn't trying to man up so I left instead of caring for a little boy. How do I deal with a person that has made $300 worth of child support payments in 2 1/2 yrs and feels like he now has a say so in my sons life? There's a lot of history between us that I have no issue answering, but how do I go forward with this? I am trying to be nice but his actions has made it difficult to trust him so why waste my time and my sons time (who has no clue who he is) if he only cares every couple weeks and refuses to get past the fact that I've moved on.

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