"With him I have a hope of a comfortable family life"
Really?
Even if he would still want to be with you, I am not so sure you would have a comfortable family life. He just isnt a very nice person. Not to you at least he isnt.
Having a child puts an enormous strain on even the best relationships. I dont think you have any idea what awaits you regards to the reality of a newborn. To most couples it is like a bomb has been thrown into their existence and just gone off at the arrival of a newborn.
If he cant cope with you suffering bereavement, how will he cope with the never ending sleepless nights and sleep deprivation during babys first year? How will he cope with you being knackered all the time?
How will he cope with you being sore, stitched up down below and bleeding gallons of goo, being to uncomfortable to even go to the loo. Recovering from pregnancy and giving birth?
What if there are complications in pregnancy? Complications during/after birth?
How will he cope with you being frazzled and frustrated as you have been home with a little grizzly bear that cant talk, whose only form of communication is high pitched screams, and requires you to walk around and rock her/him for hours, feeding issues, reflux, colic, constipation, sore and cracked nipples, frustration at baby not latching on properly, worry that baby is not getting enough food, not putting on enough weight. Wont nap in the daytim time, making your day spin and spin like a washing machine on repeat, feeding every two hours throughout the night and then take an hour or so to settle, just to need a nappy change, and then wake up screaming while nappy is changed, and then require another hour, and another feed to settle back to sleep?
How will he cope with coming home to a pit of a house because you have not had time to clean, tidy, do dishes, or cook dinner? Will he be understanding because you have been home with the baby, or will he throw a strop that he has been out working all day and he is coming home to this ?
Based on how this man has coped with you losing your mum and going through bereavement, and you losing your focus on him for a bit? You honestly think your relationship can survive a baby?
Sorry to be harsh, but please take off your rose-tinted spectacles regards this man and the state of your relationship.