Life is a tough trip!
If two people don't take the decision to work stuff out between each other or if soemone gets to just one of them, both lives will be at the mercy of other dictators! Some of these will have best intentions but only you and the partner can know the core things going on in your hearts and minds!!
If you don't share it I can guarantee you this - poison will affect one or both to a point where it becomes impossible to rebuild bridges to a best case scenario!
Furthermore if your partner is one likely to backtrack on agreements or if your communications are already under the influence of what others say to him, you will feel compromised and unable to trust in agreed solutions to your situation!
So the best resolution IMO depends upon how well you know him and how well you feel him trust your feelings and wishes for the future!
This is why religion can be so damaging - it can utterly undermine and destroy the humsn-human bonds that need be there to make joint decisions on all your lives in a loving, caring, compassionate manner!
If you can't work together then the nightmare reles and regulations take root!
In both your heads too much time will be spent dwelling on legal stuff and this is usually negative emotion rift building stuff!
He will feel the law is weighted to you and may be given advice telling him that the child is already 90% yours by law etc and so his claim to be the father he may want to be already doesnt exist! That's just the start as I'm sure you're aware! It gives you a taste of the mindfood each of you will expose yourselves to once one of you feels they must negotiate outside the two of you!
So the question you ask is no straightforward one! And if he does not love you it is even less of a good idea!
If he does love you thenm I wonder why he isn't with you?
He should always choose love everytime for it is what gives life meaning! But it must be his love for you coupled with your love for him and you both building your religion on that foundation! You need no organisation to do that! Just each other and nature IMO! That is religion to me and why I wonder why he walks away if he feels it?
Either he has deep affection for you but is not in love or he is utterly confused still by JW godspeak of men who love to control others or maybe both!
I'm sad your situation is already complicated beyond your both knowing where life is headed and wanting the same things!
Best wishes - I hope I made some sense that may be of some use?