I don't think you should stress yourself over something you cannot control. You should tell him you need to talk in a quite place & express how you feel,if nothing changes then focus your energy & thoughts on the baby. I know it's hard because you had the support from the first dad ;however, every man is different some will not go into daddy mode until the baby is born especially being his first. Don't stress yourself it's going to affect the baby.
Thank you, your 100% correct.