Child of the 60s here. I always say that I'm very grateful to my mum for showing me how to be a good mother. I just did everything exactly opposite to how she did it.
She had no time for girl children at all, possibly down to her own parents attitude which was to keep having kids until eventually, after 5 girls, they got the precious son to work and inherit the farm. (Apparently he turned out to be a lazy drunken waster who did nothing for them. Karma's a bitch).
So my mother thought the sun shone out of my brothers' arse. My father was horribly strict and controlling and violent to my lbrothers, and horrifically verbally abusive also.
Because she considered me to be his "pet" she felt duty bound to make sure that the abuse I didn't get from him, I got from her. From the earliest age I remember knowing that she couldn't bear to touch me. If she had to hold my hand crossing the road, she'd grab and pull/squeeze/drag me along and drop my hand like a hot potato as soon as she could. If I transgressed in any way at home, she'd wallop me but her favourite was to pinch me hard on the arm while hissing "you little bitch" at me. She told me I'd never amount to anything and that no man would ever want me. (That one turned me into an extremely promiscuous young woman for a few years!).
I went through a phase, around about 11/12/13, where, having realised that my friends home lives weren't like mine, I would attempt to ask her why she didn't love me. The response was always shut up go away don't bother me, as she turned her back and walked away from me.
I can honestly say that I had no idea what it felt like to love or be loved by another human being, until I met my DH at 23. I had a history of running a mile from any man who told me they loved me. Because I knew that I was unloveable so therefore they were lying. Then I met DH and it felt like we'd known each other all our lives. After a few months I could feel him working up to telling me he loved me and it didn't scare me the way it usually did. But, I had to think hard about I felt about him. Might I possibly love him? I certainly fancied the socks off him. I enjoyed his company and we got each other's sense of humour, loved doing all the same stuff etc. Did that mean I loved him? Just what did love FEEL like?
What decided it for me was thinking, did I ever love anything in the world, and was that feeling compatible to how I felt about him? Well when I was a teenager we had a dog who I adored, who I often hugged and told her all my secrets and I knew that she loved me just for being me.
So yes, I realised that maybe I did actually love him as (some of!) the feelings were the same. I can still remember, 30-odd years later, how weird it felt and sounded to actually say "I love you".
It obviously has got much easier over time, as I tell my now adult DCs several times a day every day how much I love them. They were so easy to raise, no slapping, no shouting, no nasty viciousness at all. Just a bit of mutual respect and plenty of talking /explaining if they did anything "wrong".
By the way I've never told my DH about comparing my feelings about him to what I'd felt for a dog - definitely too weird!