My heart is heavy.. ?????

Kristin • 18 years young⚓️ Mommy to the most amazing lil man.☺️ In love with my best friend.
Well my son's sperm donor left when he was 3 months old. I tried to maintain contact with his "father" so they could have a relationship but instead he didn't want his child. Well Kobe is now 2 1/2 and just recently I got mail from the department of human services about enforcing child support. The next day my ex got ahold of me and now wants to begin seeing my son again. He says he wants to be the father our child needs but I just don't know seeing as how it's been this long..