but OMG I know he HAS to love her... right??
I literally busted out laughing. Personally, my Uncle's a pot smoking, manipulating piece of shit. He'd lie to you just to get all your money (all 5 cents), that's just the way he is. I don't know if that's how your ex is or not. But I'm assuming he does pot or drinks or has some "bad habit" like that. If you checked that box as true, I'd start to check off the "I don't think he cares about her" box too.
Maybe he does like her, maybe he doesn't. I can't really tell you that. But what I *can* tell you to do, is make sure you watch your step. Document every fucking thing you do, make sure it can be used as "evidence" in court. He said/she said bullshit doesn't stand up in court very well. Use e-mails and DO NOT fucking LOSE THEM ever.
This is the story with my Aunt:
She was 18, 19, got Married (Mexican girl wanted in America). Had a kid. Was happy (so she thought), was basically his bitch (it's how all beaners are and are content with it), cleaned his house, listened to him whine, he probably beat her (never heard about it though), etc. But anyways.
She wanted to go to College, the agreement was "You watch him for 2-3 years and when I'm out of College I'll take him off your hands forever." 100% Verbal. Everybody in our family knew, and he said "OK." You know, thought it was gonna be fine. When the day comes, "Nope, I never said that." Been a custody battle ever since.
TO PREVENT THE ABOVE FROM HAPPENING TO YOU: Document everything with usable evidence in court. Not "he said she said" crap.
If your daughter's 8 months old, she doesn't feel anything. If you smacked her today she'd probably forget about it tomorrow. In four years from now when life matters, and she has a memory, she might care. But personally, I don't see it that way.
You said he didn't sign the birth certificate. A real daddy would rather die than deny his child.
If he put a gun to her head and demanded something, would you think he still cared about her? - This is a very crude and unrealistic example of showing what he meant by that, but think about it...