Advice from single moms?

Hi all I’m newly a single mom to my son. The baby’s father wants nothing to do with me or the baby & neither does his family, because they don’t want to betray him they said. Often times I feel sad, lonely, & depressed and I blame myself for getting pregnant. I also find myself stalking their pages too. He has two other kids that they acknowledge but they don’t acknowledge my son. It hurts my feelings. When does the pain lessen? How do I cope?