Be gentle with yourself honey - the journey is really challenging & we all experience it so differently...
I had 4 live term babies before Imogen. She was born after 3 early losses and 3 second trimester losses - so when she was lifted out of me onto that resus table and she was breathing. To me that was the biggest miracle I had ever experienced. It still is!
So, I didn't have bonding issues - I abdicated all control whilst she was in NICU and I must say I was afraid of touching her... (I had influenza A at her birth) Even when my swabs were clear. I was paranoid about anyone touching her. Paranoid in close to the true sense of the word.
She was very very very slow to progress - probably due to her very low for dates birth weight (815g @ 27+5 gest). I remeber the day she came home. I felt in slow motion carrying her up the front stairs & into her home. It felt like the end of a long marathon. It felt complete.
I didn't worry about her anymore after that breathing wise. She coslept or slept beside my bed until very recently. I was very careful about people touching her and handling her.
For me my bond with her is incredibly strong - but my journey was different.
What I have witnessed is that that bond will happen my love - in time it will. Don't compare yourself to others - yyour story is yours and you are doing a great job at mothering your little one.