That it will get better.
When my son was a baby I was so desperately unhappy and would repeatedly tell my husband that I wish we had never had him. I found him very challenging and often found myself dragging myself out of bed to respond to him, muttering to myself "why are you so difficult to love?"
When the depression passed I beat myself up constantly that our bond would be affected and he would somehow know that I had felt this way.
Now, at almost five, he is the most loving, demonstrative and happy child and fills my life with joy, kisses and cuddles.
It has been a roller-coaster recovery for me but I think if someone had told me that I wasn't damaging him irrevocably then it would have helped, so I am telling you...