Child support is not something that you and a spouse should have to fight over after a divorce or break up; it's meant to go to your children, the children you raised and intended on supporting until their adult lives. Although this is the case, sometimes you and the other parent may disagree on how much child support is needed or where it should be spent. If you've never been married, then someone may not feel obligated to pay, even though this isn't true by law.
In Massachusetts, child support amounts are determined by statute. That means that the income of each parent, the number of children being supported, and medical insurance costs will all be considered. If you have sole or joint custody, this can also affect how much child support is paid.