How do I make sure that my son doesn't feel rejected/unloved by his father?

I recently gave birth to a wonderful baby boy on the 28 September 2016 he is my dream, Ill die for him..
When I find out I was pregnant I ran to his father told him and he was exited for 24hrs then he left, I was only 6 weeks, to cut the story short when I gave birth I sue him for maintenance which his paying how ever his never seen his son, doesn’t even know his name, my fear is that my son is growing what am I gonna tell him when he reaches the age of understanding, is my love enough for him not to feel rejected?