Is It His Baby? Or Not?

My Boyfriend Just Recently Broke Up With Me And He Started Going Out With A Girl That Has A Baby. The Baby Is 1 And On His BBM Status He Wrote. Best Girlfriend Ever 6.17.11 And On His FB He Wrote. Happy Fathers Day ILOVE Being A Daddy. I Love You Angel. I'm Thinking It's His Baby And I Don't Know What Do Do?